diff --git a/is.go b/is.go
new file mode 100644
index 0000000..3adec89
--- /dev/null
+++ b/is.go
@@ -0,0 +1,9 @@
+package erorr
+
+import (
+	"errors"
+)
+
+func Is(err, target error) bool {
+	return errors.Is(err, target)
+}