diff --git a/doc/source/user_guide/boolean.rst b/doc/source/user_guide/boolean.rst
index 76c922fcef638..54c67674b890c 100644
--- a/doc/source/user_guide/boolean.rst
+++ b/doc/source/user_guide/boolean.rst
@@ -12,6 +12,11 @@
 Nullable Boolean data type
 **************************
 
+.. note::
+
+   BooleanArray is currently experimental. Its API or implementation may
+   change without warning.
+
 .. versionadded:: 1.0.0