diff --git a/packages/block-library/src/page-list/editor.scss b/packages/block-library/src/page-list/editor.scss
index 99b3ca55f3aa93..b02c33d59d8f5e 100644
--- a/packages/block-library/src/page-list/editor.scss
+++ b/packages/block-library/src/page-list/editor.scss
@@ -4,6 +4,22 @@
 	.wp-block-page-list {
 		background-color: inherit;
 	}
+
+	// space-between justification.
+	&.items-justified-space-between {
+		.wp-block-page-list > div,
+		.wp-block-page-list {
+			display: contents;
+			flex: 1;
+		}
+
+		&.has-child-selected .wp-block-page-list > div,
+		&.has-child-selected .wp-block-page-list,
+		&.is-selected .wp-block-page-list > div,
+		&.is-selected .wp-block-page-list {
+			flex: inherit;
+		}
+	}
 }
 
 // Make links unclickable in the editor.
diff --git a/packages/block-library/src/page-list/style.scss b/packages/block-library/src/page-list/style.scss
index 189b794886a163..7747055e309bb1 100644
--- a/packages/block-library/src/page-list/style.scss
+++ b/packages/block-library/src/page-list/style.scss
@@ -31,6 +31,7 @@
 		display: block;
 	}
 }
+
 .is-open .wp-block-navigation__container {
 	.wp-block-page-list {
 		@include break-mobile() {
@@ -38,3 +39,10 @@
 		}
 	}
 }
+
+// space-between justification.
+.wp-block-page-list {
+	.items-justified-space-between & {
+		display: contents;
+	}
+}