diff --git a/app/Http/Controllers/ChamadoController.php b/app/Http/Controllers/ChamadoController.php
index 968dffe..7d3e254 100644
--- a/app/Http/Controllers/ChamadoController.php
+++ b/app/Http/Controllers/ChamadoController.php
@@ -40,8 +40,11 @@ public function index()
         if (Gate::allows('admin')) {
             $chamados = Chamado::all();
         } else {
-            $user = \Auth::user();
-            $chamados = Chamado::where('user_id', '=', $user->id)->orderBy('created_at', 'desc')->get();
+            /* precisa melhorar isto */
+            $chamados = Chamado::whereHas('users', function ($pivot) {
+                $user = \Auth::user();
+                $pivot->where('user_id', $user->id);
+            })->orderBy('created_at', 'desc')->get();
         }
 
         return view('chamados/index', compact('chamados'));
@@ -170,10 +173,10 @@ public function show(Chamado $chamado)
         if (empty($template)) {
             $template = [];
         }
-        #dd($template);
+        $autor = $chamado->users()->wherePivot('funcao', 'Autor')->first();
         $complexidades = $this->complexidades;
 
-        return view('chamados/show', compact('chamado', 'extras', 'template', 'complexidades'));
+        return view('chamados/show', compact('autor', 'chamado', 'extras', 'template', 'complexidades'));
     }
 
     /**
@@ -189,8 +192,9 @@ public function edit(Chamado $chamado)
         $predios = $this->predios;
         $atendentes = $this->atendentes;
         $complexidades = $this->complexidades;
+        $autor = $chamado->users()->wherePivot('funcao', 'Autor')->first();
         $form = JSONForms::generateForm($fila, $chamado);
-        return view('chamados/edit', compact('fila', 'chamado', 'predios', 'atendentes', 'complexidades', 'form'));
+        return view('chamados/edit', compact('autor', 'fila', 'chamado', 'predios', 'atendentes', 'complexidades', 'form'));
     }
 
     /**
@@ -240,7 +244,6 @@ private function grava(Chamado $chamado, Request $request)
             $chamado->atribuido_em = null;
             $chamado->complexidade = null;
             $user = \Auth::user();
-            $chamado->user_id = $user->id;
         } else {
             $request->validate([
                 'telefone' => ['required'],
@@ -294,10 +297,9 @@ private function grava(Chamado $chamado, Request $request)
             /* Atualiza telefone da pessoa */
             $user->telefone = $request->telefone;
             $user->save();
-
-            $chamado->user_id = $user->id;
         }
         $chamado->save();
+        $chamado->users()->attach($user->id, ['funcao' => 'Autor']);
         return $chamado;
     }
 
diff --git a/app/Models/Chamado.php b/app/Models/Chamado.php
index f347188..a6dd212 100644
--- a/app/Models/Chamado.php
+++ b/app/Models/Chamado.php
@@ -12,8 +12,10 @@ class Chamado extends Model
 {
     use HasFactory;
     
-    public function user(){
-        return $this->belongsTo(User::class);
+    public function users()
+    {
+        return $this->belongsToMany('App\Models\User', 'user_chamado')
+            ->withPivot('funcao')->withTimestamps();
     }
 
     public function comentarios()
diff --git a/app/Models/User.php b/app/Models/User.php
index 1d19edd..4b50eec 100644
--- a/app/Models/User.php
+++ b/app/Models/User.php
@@ -100,9 +100,9 @@ public static function getByCodpes($codpes) {
         return User::where('codpes',$codpes)->first();
     }
 
-
     /**
      * Relacionamento n:n com fila, atributo funcao: Gerente, Atendente
+     * TODO: não deveria ser filas?
      */
     public function fila()
     {
@@ -110,4 +110,15 @@ public function fila()
             ->withPivot('funcao')
             ->withTimestamps();
     }
+
+    /**
+     * Relacionamento n:n com chamado, atributo funcao:
+        - Atendente, Atribuidor, Autor, Observador
+     */
+    public function chamados()
+    {
+        return $this->belongsToMany('App\Models\Chamado')
+            ->withPivot('funcao')
+            ->withTimestamps();
+    }
 }
diff --git a/app/Policies/ChamadoPolicy.php b/app/Policies/ChamadoPolicy.php
index 723a6c1..df59b6c 100644
--- a/app/Policies/ChamadoPolicy.php
+++ b/app/Policies/ChamadoPolicy.php
@@ -32,8 +32,10 @@ public function viewAny(User $user)
     public function view(User $user, Chamado $chamado)
     {
         // Quem pode ver: o autor, atendentes ou admin
-        if($user->codpes == $chamado->user->codpes){
-            return true;               
+        foreach ($chamado->users as $u) {
+            if ($user->codpes == $u->codpes) {
+                return true;
+            }
         }
         if(Gate::allows('admin')){
             return true;
@@ -67,8 +69,10 @@ public function create(User $user)
     public function update(User $user, Chamado $chamado)
     {
         // Quem pode ver: o autor, atendentes ou admin
-        if($user->codpes == $chamado->user->codpes){
-            return true;               
+        foreach ($chamado->users as $u) {
+            if ($user->codpes == $u->codpes) {
+                return true;
+            }
         }
         if(Gate::allows('admin')){
             return true;
diff --git a/database/factories/ChamadoFactory.php b/database/factories/ChamadoFactory.php
index 9d06d28..bc3d832 100644
--- a/database/factories/ChamadoFactory.php
+++ b/database/factories/ChamadoFactory.php
@@ -45,7 +45,6 @@ public function definition()
                 'patrimonio'     =>  $this->faker->unique()->numberBetween(10000, 999999),
                 'status'         =>  $status,
                 'complexidade'   =>  $complexidades[array_rand($complexidades)],
-                'user_id'        =>  User::inRandomOrder()->first()->id,
                 'fila_id'        =>  Fila::inRandomOrder()->first()->id,
                 'fechado_em'     =>  $fechado_em,
                 'atribuido_em'     =>  $atribuido_em,
diff --git a/database/migrations/2020_10_06_135511_create_chamados_table.php b/database/migrations/2020_10_06_135511_create_chamados_table.php
index 907331f..908a007 100644
--- a/database/migrations/2020_10_06_135511_create_chamados_table.php
+++ b/database/migrations/2020_10_06_135511_create_chamados_table.php
@@ -41,7 +41,6 @@ public function up()
             $table->json('extras')->nullable();
 
             /* Relacionamentos */
-            $table->foreignId('user_id')->nullable()->constrained('users')->onDelete('set null');
             $table->foreignId('fila_id')->constrained('filas');
 
             $table->timestamps();
diff --git a/database/migrations/2020_10_14_165152_create_user_chamado_table.php b/database/migrations/2020_10_14_165152_create_user_chamado_table.php
new file mode 100644
index 0000000..996682b
--- /dev/null
+++ b/database/migrations/2020_10_14_165152_create_user_chamado_table.php
@@ -0,0 +1,37 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class CreateUserChamadoTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('user_chamado', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('user_id')->nullable()->constrained('users');
+            $table->foreignId('chamado_id')->constrained('chamados')->onDelete('cascade');
+
+            $funcoes = ['Atendente', 'Atribuidor', 'Autor', 'Observador'];
+            $table->enum('funcao', $funcoes)
+;
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('user_chamado');
+    }
+}
diff --git a/database/seeders/ChamadoSeeder.php b/database/seeders/ChamadoSeeder.php
index f78145d..7e20118 100644
--- a/database/seeders/ChamadoSeeder.php
+++ b/database/seeders/ChamadoSeeder.php
@@ -28,12 +28,13 @@ public function run()
                 "dia"    : "1951-07-22",
                 "obs"    : "Fonte queimada. Precisa trocar."
             }',
-            'user_id'        =>  1,
             'fila_id'        =>  1
         ];
 
-        Chamado::create($chamado);
-        Chamado::factory(10)->create();
-     
+        $cht = Chamado::create($chamado);
+        $cht->users()->attach(User::first()->id, ['funcao' => 'Autor']);
+        Chamado::factory(10)->create()->each(function ($chamado) {
+            $chamado->users()->attach(User::inRandomOrder()->first()->id, ['funcao' => 'Autor']);
+        });
     }
 }
diff --git a/resources/views/chamados/form.blade.php b/resources/views/chamados/form.blade.php
index a79ecdc..6b7e214 100644
--- a/resources/views/chamados/form.blade.php
+++ b/resources/views/chamados/form.blade.php
@@ -40,7 +40,7 @@
 
     <div class="col-sm form-group">
         <label for="nome"><b>Número USP do(a) requisitante:</b></label>
-        <input class="form-control" id="codpes" name="codpes" value="{{ $chamado->user->codpes ?? old('codpes') }}">
+        <input class="form-control" id="codpes" name="codpes" value="{{ $autor->codpes ?? old('codpes') }}">
         <small id="codpesHelp" class="form-text text-muted">Exemplo: 123456</small>
     </div>
 
diff --git a/resources/views/chamados/show.blade.php b/resources/views/chamados/show.blade.php
index 93bbb62..006e8a3 100644
--- a/resources/views/chamados/show.blade.php
+++ b/resources/views/chamados/show.blade.php
@@ -41,7 +41,7 @@
             <div class="col-md-4">
 
                 {{-- Painel direito --}}
-                <span class="text-muted">Criado por:</span> {{ $chamado->user->name}}<br>
+                <span class="text-muted">Criado por:</span> {{ $autor->name }}<br>
                 <span class="text-muted">Criado em:</span> {{ Carbon\Carbon::parse($chamado->created_at)->format('d/m/Y H:i') }}<br>
 
                 @if(!is_null($chamado->fechado_em))