diff --git a/README.md b/README.md
index 723389ec..64476405 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 Yet Another ORM library for Go, aims for developer friendly
 
 ## TODO
-* Complex where query (= / > / < / <> / in)
+* Complex where query (in)
 * Order
 * Limit
 * Select
diff --git a/orm_test.go b/orm_test.go
index 1ecec736..f12d084b 100644
--- a/orm_test.go
+++ b/orm_test.go
@@ -180,4 +180,12 @@ func TestComplexWhere(t *testing.T) {
 	if len(users) != 2 {
 		t.Errorf("Should only found 2 users's birthday <= t2, but have %v", len(users))
 	}
+
+	users = []User{}
+	a := db.Where("name in (?)", []string{"1", "3"}).Find(&users)
+	a.db.Query("SELECT * FROM users WHERE ( name in ($1) )", "'1', '2'")
+
+	if len(users) != 3 {
+		t.Errorf("Should only found 3 users's name in (1, 3), but have %v", len(users))
+	}
 }
diff --git a/sql.go b/sql.go
index 290327f6..d8857314 100644
--- a/sql.go
+++ b/sql.go
@@ -144,7 +144,20 @@ func (s *Orm) whereSql() (sql string) {
 			str := "( " + clause["query"].(string) + " )"
 			args := clause["args"].([]interface{})
 			for _, arg := range args {
-				str = strings.Replace(str, "?", s.addToVars(arg), 1)
+
+				switch arg.(type) {
+				case []string, []int, []int64, []int32:
+					var temp_marks []string
+					for _ = range arg.([]string) {
+						temp_marks = append(temp_marks, "?")
+					}
+					str = strings.Replace(str, "?", strings.Join(temp_marks, ","), 1)
+					for _, a := range arg.([]string) {
+						str = strings.Replace(str, "?", s.addToVars(a), 1)
+					}
+				default:
+					str = strings.Replace(str, "?", s.addToVars(arg), 1)
+				}
 			}
 			conditions = append(conditions, str)
 		}