A heat dissipating device includes a heat sink (50) for removing heat from an electronic device (90), and a plurality of adjusters (45) for adjusting distance and contact force between the electronic device and the heat sink. The heat sink defines a plurality of receiving holes (62) for receiving respective adjusters, and a plurality of communicating through holes (66) whose diameters are smaller than those of the receiving holes. A shoulder (64) of the heat sink is formed where each receiving hole communicates with each through hole. Each adjuster comprises a connecting shaft (42), a lock screw (46) with a head (464), and a spring (44). The lock screw threadedly engages with the connecting shaft, and the spring is secured between the shoulder of the heat sink and the head.