A heat dissipating device is adapted to remove heat from an electronic package. The heat dissipating device includes a heat sink (6), a fan (1) and a fan holder (2). The fan holder comprises a guiding receptacle (20) and a securing base (40) covering the heat sink. An inlet (24) of the guiding receptacle is coupled to the bottom of the fan. An opening (221) is defined in the guiding receptacle for providing airflow access from the fan to the heat sink.