diff --git a/AUTHORS.rst b/AUTHORS.rst
index 539d3e9f..c3082a80 100644
--- a/AUTHORS.rst
+++ b/AUTHORS.rst
@@ -79,3 +79,4 @@ Contributors (chronological)
 - Renato Damas `@codectl <https://github.com/codectl>`_
 - Tayler Sokalski `@tsokalski <https://github.com/tsokalski>`_
 - Sebastien Lovergne `@TheBigRoomXXL <https://github.com/TheBigRoomXXL>`_
+- Luna Lovegood `@duchuyvp <https://github.com/duchuyvp>`_
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index c7b07a21..944fc399 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -9,6 +9,8 @@ Features:
 - ``MarshmallowPlugin``: Support different datetime formats
   for ``marshmallow.fields.DateTime`` fields (:issue:`814`).
   Thanks :user:`TheBigRoomXXL` for the suggestion and PR.
+- ``MarshmallowPlugin``: Handle resolving names of schemas with spaces in the name (:pr:`856`).
+  Thanks :user:`duchuyvp` for the PR.
 
 Other changes:
 
diff --git a/src/apispec/ext/marshmallow/__init__.py b/src/apispec/ext/marshmallow/__init__.py
index 2595581d..46021005 100644
--- a/src/apispec/ext/marshmallow/__init__.py
+++ b/src/apispec/ext/marshmallow/__init__.py
@@ -89,8 +89,8 @@ def resolver(schema: type[Schema]) -> str:
     schema_cls = resolve_schema_cls(schema)
     name = schema_cls.__name__
     if name.endswith("Schema"):
-        return name[:-6] or name
-    return name
+        name = name[:-6] or name
+    return name.strip()
 
 
 class MarshmallowPlugin(BasePlugin):