A heat sink clip (30) includes an elongated resilient main body (31) with two spaced barbs (315) at a first end thereof, a first locking member (33) coupled with a second end of the main body and a moveable second locking member (32) movably coupled with the first end of the main body. The barbs each vertically extend and include a neck (3151) connecting with the main body and a locking end (3152) at a free end thereof. The moveable second locking member includes an operating portion (321) and a locking leg (322) defining two connecting slots (323) therein. Each of the connecting slots includes a longitudinally narrow portion (3231) and a longitudinally wide portion (3232) beside the narrow portion. The barbs enter the connecting slots through the wide portions and the necks are received in the narrow portions.