diff --git a/test_time_to_first_response.py b/test_time_to_first_response.py
index a8d8b1c..58259c6 100644
--- a/test_time_to_first_response.py
+++ b/test_time_to_first_response.py
@@ -34,6 +34,7 @@ def test_measure_time_to_first_response(self):
         # Set up the mock GitHub issues
         mock_issue1 = MagicMock()
         mock_issue1.comments = 2
+        mock_issue1.issue.user.login = "issue_owner"
         mock_issue1.created_at = "2023-01-01T00:00:00Z"
 
         # Set up the mock GitHub issue comments
@@ -55,6 +56,7 @@ def test_measure_time_to_first_response_no_comments(self):
         # Set up mock issues with no comments
         mock_issue1 = MagicMock()
         mock_issue1.comments = 0
+        mock_issue1.issue.user.login = "issue_owner"
         mock_issue1.created_at = "2023-01-01T00:00:00Z"
 
         # Call the function
@@ -70,6 +72,7 @@ def test_measure_time_to_first_response_with_pull_request_comments(self):
         # Set up the mock GitHub issues
         mock_issue1 = MagicMock()
         mock_issue1.comments = 2
+        mock_issue1.issue.user.login = "issue_owner"
         mock_issue1.created_at = "2023-01-01T00:00:00Z"
         mock_issue1.pull_request_urls = {"url": "https://api.github.com/repos/owner/repo/pulls/1"}
 
@@ -93,6 +96,7 @@ def test_measure_time_to_first_response_issue_comment_faster(self):
         # Set up the mock GitHub issues
         mock_issue1 = MagicMock()
         mock_issue1.comments = 2
+        mock_issue1.issue.user.login = "issue_owner"
         mock_issue1.created_at = "2023-01-01T00:00:00Z"
         mock_issue1.pull_request_urls = {"url": "https://api.github.com/repos/owner/repo/pulls/1"}
 
@@ -119,6 +123,7 @@ def test_measure_time_to_first_response_pull_request_comment_faster(self):
         # Set up the mock GitHub issues
         mock_issue1 = MagicMock()
         mock_issue1.comments = 2
+        mock_issue1.issue.user.login = "issue_owner"
         mock_issue1.created_at = "2023-01-01T00:00:00Z"
         mock_issue1.pull_request_urls = {"url": "https://api.github.com/repos/owner/repo/pulls/1"}
 
@@ -144,6 +149,7 @@ def test_measure_time_to_first_response_ignore_users(self):
         # Set up the mock GitHub issues
         mock_issue1 = MagicMock()
         mock_issue1.comments = 4
+        mock_issue1.issue.user.login = "issue_owner"
         mock_issue1.created_at = "2023-01-01T00:00:00Z"
 
         # Set up the mock GitHub issue comments (one ignored, one not ignored)
@@ -176,6 +182,7 @@ def test_measure_time_to_first_response_only_ignored_users(self):
         # Set up the mock GitHub issues
         mock_issue1 = MagicMock()
         mock_issue1.comments = 4
+        mock_issue1.issue.user.login = "issue_owner"
         mock_issue1.created_at = "2023-01-01T00:00:00Z"
         mock_issue1.pull_request_urls = {"url": "https://api.github.com/repos/owner/repo/pulls/1"}
 
@@ -206,6 +213,40 @@ def test_measure_time_to_first_response_only_ignored_users(self):
         # Check the results
         self.assertEqual(result, expected_result)
 
+    def test_measure_time_to_first_response_ignore_issue_owners_comment(self):
+        """Test that measure_time_to_first_response ignore issue owner's comment."""
+        # Set up the mock GitHub issues
+        mock_issue1 = MagicMock()
+        mock_issue1.comments = 4
+        mock_issue1.issue.user.login = "issue_owner"
+        mock_issue1.created_at = "2023-01-01T00:00:00Z"
+        mock_issue1.pull_request_urls = {"url": "https://api.github.com/repos/owner/repo/pulls/1"}
+
+        # Set up the mock GitHub issue comments
+        mock_comment1 = MagicMock()
+        mock_comment1.user.login = "issue_owner"
+        mock_comment1.created_at = datetime.fromisoformat("2023-01-02T00:00:00Z")
+        mock_comment2 = MagicMock()
+        mock_comment2.user.login = "other_user"
+        mock_comment2.created_at = datetime.fromisoformat("2023-01-05T00:00:00Z")
+        mock_issue1.issue.comments.return_value = [mock_comment1, mock_comment2]
+
+        # Set up the mock GitHub pull request comments
+        mock_pr_comment1 = MagicMock()
+        mock_pr_comment1.user.login = "issue_owner"
+        mock_pr_comment1.submitted_at = datetime.fromisoformat("2023-01-03T00:00:00Z")
+        mock_pr_comment2 = MagicMock()
+        mock_pr_comment2.user.login = "other_user"
+        mock_pr_comment2.submitted_at = datetime.fromisoformat("2023-01-04T00:00:00Z")
+        mock_issue1.issue.pull_request().reviews.return_value = [mock_pr_comment1, mock_pr_comment2]
+
+        # Call the function
+        result = measure_time_to_first_response(mock_issue1, None)
+        expected_result = timedelta(days=3)
+
+        # Check the results
+        self.assertEqual(result, expected_result)
+
 
 class TestGetAverageTimeToFirstResponse(unittest.TestCase):
     """Test the get_average_time_to_first_response function."""
diff --git a/time_to_first_response.py b/time_to_first_response.py
index 5cf2532..6e4fef9 100644
--- a/time_to_first_response.py
+++ b/time_to_first_response.py
@@ -55,6 +55,8 @@ def measure_time_to_first_response(
         for comment in comments:
             if comment.user.login in ignore_users:
                 continue
+            if comment.user.login == issue.issue.user.login:
+                continue
             first_comment_time = comment.created_at
             break
 
@@ -66,6 +68,8 @@ def measure_time_to_first_response(
             for review_comment in review_comments:
                 if review_comment.user.login in ignore_users:
                     continue
+                if review_comment.user.login == issue.issue.user.login:
+                    continue
                 first_review_comment_time = review_comment.submitted_at
                 break