A heat dissipation device includes a fin set, a sinuous heat pipe transferring heat to different parts of the fin set, and a base thermally contacting the heat pipe. The heat pipe has a middle U-shaped portion and two L-shaped portions at two sides of the U-shaped portion, respectively. The base is for contacting with a heat generating electronic device and transferring heat from the electronic device to the heat pipe and the fin set. The fin set defines a passageway in a middle of thereof. The U-shaped portion of the heat pipe is received in the passageway of the fin set and thermally engages with the fin set.