diff --git a/pandas/core/strings.py b/pandas/core/strings.py
index 25350119f9df5..c388db8219a1d 100644
--- a/pandas/core/strings.py
+++ b/pandas/core/strings.py
@@ -2107,7 +2107,9 @@ def _get_series_list(self, others):
         elif isinstance(others, np.ndarray) and others.ndim == 2:
             others = DataFrame(others, index=idx)
             return [others[x] for x in others]
-        elif is_list_like(others, allow_sets=False):
+        elif is_list_like(others, allow_sets=False) and not isinstance(
+            others, type(self)
+        ):
             others = list(others)  # ensure iterators do not get read twice etc
 
             # in case of list-like `others`, all elements must be
diff --git a/pandas/tests/test_strings.py b/pandas/tests/test_strings.py
index bc8dc7272a83a..e7725476407ee 100644
--- a/pandas/tests/test_strings.py
+++ b/pandas/tests/test_strings.py
@@ -437,6 +437,11 @@ def test_str_cat_raises_intuitive_error(self, box):
         with pytest.raises(ValueError, match=message):
             s.str.cat("    ")
 
+        # test whether error is raise when others is StringMethod
+        message = "others must be Series, Index, DataFrame,.*"
+        with pytest.raises(TypeError, match=message):
+            s.str.cat(others=s.str)
+
     @pytest.mark.parametrize("sep", ["", None])
     @pytest.mark.parametrize("dtype_target", ["object", "category"])
     @pytest.mark.parametrize("dtype_caller", ["object", "category"])