diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index a5b523e662..9e1ea254f8 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -32,6 +32,7 @@ Changelog
  * Fix: Document tags no longer fail to update when replacing the document file at the same time (Matt Westcott)
  * Fix: Prevent error from very tall / wide images being resized to 0 pixels (Fidel Ramos)
  * Fix: Remove excess margin when editing snippets (Quadric)
+ * Fix: Added `scope` attribute to table headers in TableBlock output (Quadric)
 
 
 2.8 (03.02.2020)
diff --git a/docs/releases/2.9.rst b/docs/releases/2.9.rst
index 05603f8eed..03072027e6 100644
--- a/docs/releases/2.9.rst
+++ b/docs/releases/2.9.rst
@@ -50,6 +50,7 @@ Bug fixes
  * Document tags no longer fail to update when replacing the document file at the same time (Matt Westcott)
  * Prevent error from very tall / wide images being resized to 0 pixels (Fidel Ramos)
  * Remove excess margin when editing snippets (Quadric)
+ * Added ``scope`` attribute to table headers in TableBlock output (Quadric)
 
 
 Upgrade considerations
diff --git a/wagtail/contrib/table_block/templates/table_block/blocks/table.html b/wagtail/contrib/table_block/templates/table_block/blocks/table.html
index 6ac4ec9cd1..116ede4271 100644
--- a/wagtail/contrib/table_block/templates/table_block/blocks/table.html
+++ b/wagtail/contrib/table_block/templates/table_block/blocks/table.html
@@ -9,7 +9,7 @@
         <tr>
             {% for column in table_header %}
             {% with forloop.counter0 as col_index %}
-                <th {% cell_classname 0 col_index %}>
+                <th scope="col" {% cell_classname 0 col_index %}>
                     {% if column.strip %}
                         {% if html_renderer %}
                             {{ column.strip|safe|linebreaksbr }}
@@ -30,7 +30,7 @@
             {% for column in row %}
             {% with forloop.counter0 as col_index %}
                 {% if first_col_is_header and forloop.first %}
-                    <th {% cell_classname row_index col_index table_header %}>
+                    <th scope="row" {% cell_classname row_index col_index table_header %}>
                         {% if column.strip %}
                             {% if html_renderer %}
                                 {{ column.strip|safe|linebreaksbr }}
diff --git a/wagtail/contrib/table_block/tests.py b/wagtail/contrib/table_block/tests.py
index 9045778132..f340c58da1 100644
--- a/wagtail/contrib/table_block/tests.py
+++ b/wagtail/contrib/table_block/tests.py
@@ -63,7 +63,7 @@ class TestTableBlock(TestCase):
         expected = """
             <table role="table">
                 <thead>
-                    <tr><th>Test 1</th><th class="htLeft">Test 2</th><th>Test 3</th></tr>
+                    <tr><th scope="col">Test 1</th><th scope="col" class="htLeft">Test 2</th><th scope="col">Test 3</th></tr>
                 </thead>
                 <tbody>
                     <tr><td></td><td class="htRight"></td><td></td></tr>
@@ -133,7 +133,7 @@ class TestTableBlock(TestCase):
         expected = """
             <table role="table">
                 <thead>
-                    <tr><th>Foo</th><th>Bar</th><th>Baz</th></tr>
+                    <tr><th scope="col">Foo</th><th scope="col">Bar</th><th scope="col">Baz</th></tr>
                 </thead>
                 <tbody>
                     <tr><td></td><td></td><td></td></tr>
@@ -155,9 +155,9 @@ class TestTableBlock(TestCase):
         expected = """
             <table role="table">
                 <tbody>
-                    <tr><th>Foo</th><td>Bar</td><td>Baz</td></tr>
-                    <tr><th>one</th><td>two</td><td>three</td></tr>
-                    <tr><th>four</th><td>five</td><td>six</td></tr>
+                    <tr><th scope="row">Foo</th><td>Bar</td><td>Baz</td></tr>
+                    <tr><th scope="row">one</th><td>two</td><td>three</td></tr>
+                    <tr><th scope="row">four</th><td>five</td><td>six</td></tr>
                 </tbody>
             </table>
         """
@@ -175,11 +175,11 @@ class TestTableBlock(TestCase):
         expected = """
             <table role="table">
                 <thead>
-                    <tr><th>Foo</th><th>Bar</th><th>Baz</th></tr>
+                    <tr><th scope="col">Foo</th><th scope="col">Bar</th><th scope="col">Baz</th></tr>
                 </thead>
                 <tbody>
-                    <tr><th>one</th><td>two</td><td>three</td></tr>
-                    <tr><th>four</th><td>five</td><td>six</td></tr>
+                    <tr><th scope="row">one</th><td>two</td><td>three</td></tr>
+                    <tr><th scope="row">four</th><td>five</td><td>six</td></tr>
                 </tbody>
             </table>
         """