Provided is a heat sink clip for fastening a heat sink on a printed circuit board (PCB). The heat sink clip includes two hooks and a wire clip. The two hooks are inversely fixed to the PCB at two opposite sides of the heat sink. The wire clip includes a pressing wire pressing the heat sink, two pairs of deforming wires extending from the lateral of the pressing wire along two radial directions of the pressing wire and away from the PCB, and two engaging wires engaging with the respective hooks such that the deforming wires are bent towards the PCB.