diff --git a/src/Documents/DocumentManager.php b/src/Documents/DocumentManager.php
index bc32481..50ad5f4 100644
--- a/src/Documents/DocumentManager.php
+++ b/src/Documents/DocumentManager.php
@@ -2,6 +2,7 @@
 
 namespace ElasticAdapter\Documents;
 
+use ElasticAdapter\ElasticException;
 use ElasticAdapter\Search\SearchRequest;
 use ElasticAdapter\Search\SearchResponse;
 use Elasticsearch\Client;
@@ -44,11 +45,32 @@ public function index(
             $params['body'][] = $document->getContent();
         }
 
-        $this->client->bulk($params);
+        $response = $this->client->bulk($params);
+
+        if ($response['errors'] ?? false) {
+            $error = $this->getFirstErrorFromResponse($response);
+
+            throw new ElasticException(
+                sprintf('%s: %s', $error['type'], $error['reason'])
+            );
+        }
 
         return $this;
     }
 
+    protected function getFirstErrorFromResponse(array $response)
+    {
+        foreach ($response['items'] as $item) {
+            $result = reset($item);
+
+            if (! isset($result['error'])) {
+                continue;
+            }
+            
+            return $result['error'];
+        }
+    }
+
     /**
      * @param Document[] $documents
      */
diff --git a/src/ElasticException.php b/src/ElasticException.php
new file mode 100644
index 0000000..fdd6541
--- /dev/null
+++ b/src/ElasticException.php
@@ -0,0 +1,7 @@
+<?php declare(strict_types=1);
+
+namespace ElasticAdapter;
+
+class ElasticException extends \Exception
+{
+}
\ No newline at end of file
diff --git a/src/Indices/IndexManager.php b/src/Indices/IndexManager.php
index 11679f4..0a3f12a 100644
--- a/src/Indices/IndexManager.php
+++ b/src/Indices/IndexManager.php
@@ -34,7 +34,7 @@ public function close(string $indexName): self
 
         return $this;
     }
-
+    
     public function exists(string $indexName): bool
     {
         return $this->indices->exists([
diff --git a/tests/Unit/Documents/DocumentManagerTest.php b/tests/Unit/Documents/DocumentManagerTest.php
index 1449440..81d52f2 100644
--- a/tests/Unit/Documents/DocumentManagerTest.php
+++ b/tests/Unit/Documents/DocumentManagerTest.php
@@ -4,6 +4,7 @@
 
 use ElasticAdapter\Documents\Document;
 use ElasticAdapter\Documents\DocumentManager;
+use ElasticAdapter\ElasticException;
 use ElasticAdapter\Search\SearchRequest;
 use ElasticAdapter\Search\SearchResponse;
 use Elasticsearch\Client;
@@ -235,4 +236,49 @@ public function test_documents_can_be_found(): void
         $this->assertSame(1, $response->getHitsTotal());
         $this->assertEquals(new Document('1', ['content' => 'foo']), $response->getHits()[0]->getDocument());
     }
+
+    public function test_exception_is_thrown_when_index_response_contains_error(): void 
+    {
+        $this->client
+            ->expects($this->once())
+            ->method('bulk')
+            ->with([
+                'index' => 'test',
+                'refresh' => 'false',
+                'body' => [
+                    ['index' => ['_id' => '1']],
+                    ['title' => 'Doc 1'],
+                ],
+            ])->willReturn([
+                'took' => 0,
+                'errors' => true,
+                'items' => [
+                    [
+                        'index' => [
+                            '_index' => 'test',
+                            '_type' => '_doc',
+                            '_id' => '1',
+                            'status' => 400,
+                            'error' => [
+                            'type' => "mapper_parsing_exception",
+                            'reason' => "failed to parse field [title] of type [text] in document with id '1'. Preview of field's value: 'Doc 1'",
+                            'caused_by' => [
+                                    'type' => 'illegal_state_exception',
+                                    'reason' => "Can't get text on a START_OBJECT at 1:362",
+                                ],
+                            ],
+                        ],
+                    ],
+                ],
+            ]);
+
+        $this->expectException(ElasticException::class);
+        $this->expectExceptionMessage(
+            "mapper_parsing_exception: failed to parse field [title] of type [text] in document with id '1'. Preview of field's value: 'Doc 1'"
+        );
+        
+        $this->documentManager->index('test', [
+            new Document('1', ['title' => 'Doc 1']),
+        ], false);
+    }
 }