diff --git a/changelogs/unreleased/fix-import-issue-assignees.yml b/changelogs/unreleased/fix-import-issue-assignees.yml
new file mode 100644
index 0000000000000000000000000000000000000000..063b6afaf0852be7f5db6d568150daed976e8384
--- /dev/null
+++ b/changelogs/unreleased/fix-import-issue-assignees.yml
@@ -0,0 +1,5 @@
+---
+title: Fix missing Import/Export issue assignees
+merge_request:
+author:
+type: fixed
diff --git a/lib/gitlab/import_export/import_export.yml b/lib/gitlab/import_export/import_export.yml
index dec8b4c5acdfb026e8b2d2e319bad09acac0d6bc..e68761066d8e2348a069cf8e6090b8e0d9d2c1b0 100644
--- a/lib/gitlab/import_export/import_export.yml
+++ b/lib/gitlab/import_export/import_export.yml
@@ -19,6 +19,7 @@ project_tree:
     - milestone:
       - events:
         - :push_event_payload
+    - :issue_assignees
   - snippets:
     - :award_emoji
     - notes:
diff --git a/spec/lib/gitlab/import_export/all_models.yml b/spec/lib/gitlab/import_export/all_models.yml
index 3824bb0757cf67d16dc8461df2def64cc3280f5a..6c6b9154a0a1b8fa859f051a201b8592b5b4724c 100644
--- a/spec/lib/gitlab/import_export/all_models.yml
+++ b/spec/lib/gitlab/import_export/all_models.yml
@@ -287,3 +287,6 @@ timelogs:
 - user
 push_event_payload:
 - event
+issue_assignees:
+- issue
+- assignee
\ No newline at end of file
diff --git a/spec/lib/gitlab/import_export/project.json b/spec/lib/gitlab/import_export/project.json
index 1115fb218d66192675af0991683760b4de1405f4..9a68bbb379c61cc9be7eea275db1554bdce4f4d8 100644
--- a/spec/lib/gitlab/import_export/project.json
+++ b/spec/lib/gitlab/import_export/project.json
@@ -43,7 +43,7 @@
   "issues": [
     {
       "id": 40,
-      "title": "Voluptatem amet doloribus deleniti eos maxime repudiandae molestias.",
+      "title": "Voluptatem",
       "assignee_id": 1,
       "author_id": 22,
       "project_id": 5,
@@ -60,6 +60,12 @@
       "due_date": null,
       "moved_to_id": null,
       "test_ee_field": "test",
+      "issue_assignees": [
+        {
+          "user_id": 1,
+          "issue_id": 1
+        }
+      ],
       "milestone": {
         "id": 1,
         "title": "test milestone",
diff --git a/spec/lib/gitlab/import_export/project_tree_restorer_spec.rb b/spec/lib/gitlab/import_export/project_tree_restorer_spec.rb
index 4301eee17dca60a6d0e0251a3f07cad941b49b9a..76b01b6a1ecde1c9bc450e67546d48c83b0c16ec 100644
--- a/spec/lib/gitlab/import_export/project_tree_restorer_spec.rb
+++ b/spec/lib/gitlab/import_export/project_tree_restorer_spec.rb
@@ -63,6 +63,10 @@ describe Gitlab::ImportExport::ProjectTreeRestorer do
         expect(issue.reload.updated_at.to_s).to eq('2016-06-14 15:02:47 UTC')
       end
 
+      it 'has issue assignees' do
+        expect(Issue.where(title: 'Voluptatem').first.issue_assignees).not_to be_empty
+      end
+
       it 'contains the merge access levels on a protected branch' do
         expect(ProtectedBranch.first.merge_access_levels).not_to be_empty
       end
diff --git a/spec/lib/gitlab/import_export/project_tree_saver_spec.rb b/spec/lib/gitlab/import_export/project_tree_saver_spec.rb
index d9b86e1bf3464c1484797960a7645ce74777d720..8da768ebd0789e9cd32052c4a78b838e418404d8 100644
--- a/spec/lib/gitlab/import_export/project_tree_saver_spec.rb
+++ b/spec/lib/gitlab/import_export/project_tree_saver_spec.rb
@@ -77,6 +77,10 @@ describe Gitlab::ImportExport::ProjectTreeSaver do
         expect(saved_project_json['issues'].first['notes']).not_to be_empty
       end
 
+      it 'has issue assignees' do
+        expect(saved_project_json['issues'].first['issue_assignees']).not_to be_empty
+      end
+
       it 'has author on issue comments' do
         expect(saved_project_json['issues'].first['notes'].first['author']).not_to be_empty
       end
diff --git a/spec/lib/gitlab/import_export/safe_model_attributes.yml b/spec/lib/gitlab/import_export/safe_model_attributes.yml
index 121c0ed04edfa3a905212bd9b25e3278c3d6ac45..89d30407077fd411b757b169342a2ff237c50bc6 100644
--- a/spec/lib/gitlab/import_export/safe_model_attributes.yml
+++ b/spec/lib/gitlab/import_export/safe_model_attributes.yml
@@ -506,3 +506,6 @@ ProjectAutoDevops:
 - project_id
 - created_at
 - updated_at
+IssueAssignee:
+- user_id
+- issue_id
\ No newline at end of file