diff --git a/test/test_is_full_width.py b/test/test_is_full_width.py
new file mode 100644
index 0000000..38c399e
--- /dev/null
+++ b/test/test_is_full_width.py
@@ -0,0 +1,17 @@
+import unittest
+import validator
+
+class TestIsFullWidth(unittest.TestCase):
+
+    def test_valid_full_width(self):
+        self.assertTrue(validator.is_full_width('ひらがな・カタカナ、．漢字'))
+        self.assertTrue(validator.is_full_width('３ー０　ａ＠ｃｏｍ'))
+        self.assertTrue(validator.is_full_width('Ｆｶﾀｶﾅﾞﾬ'))
+        self.assertTrue(validator.is_full_width('Ğood＝Parts'))
+        print('OK - test_valid_full_width')
+
+    def test_invalid_full_width(self):
+        self.assertFalse(validator.is_full_width('abc'))
+        self.assertFalse(validator.is_full_width('abc123'))
+        self.assertFalse(validator.is_full_width('!"#$%&()<>/+=-_? ~^|.,@`{}[]'))
+        print('OK - test_invalid_full_width')
diff --git a/validator/__init__.py b/validator/__init__.py
index 8eac2d9..45ebec7 100644
--- a/validator/__init__.py
+++ b/validator/__init__.py
@@ -30,3 +30,4 @@
 from .is_mongo_id import *
 from .is_uppercase import *
 from .is_slug import *
+from .is_full_width import *
diff --git a/validator/is_full_width.py b/validator/is_full_width.py
new file mode 100644
index 0000000..55fe4bc
--- /dev/null
+++ b/validator/is_full_width.py
@@ -0,0 +1,8 @@
+from .utils.Classes.RegEx import RegEx
+from .utils.assert_string import assert_string
+
+full_width_pattern = RegEx("[^\u0020-\u007E\uFF61-\uFF9F\uFFA0-\uFFDC\uFFE8-\uFFEE0-9a-zA-Z]")
+
+def is_full_width(input: str) -> bool:
+    input = assert_string(input)
+    return full_width_pattern.match(input)