Abstract: A fan assembly (20) for dissipating heat from an electronic device includes a bracket (30) and a fan module (40). The bracket has a retaining wall (31). The retaining wall defines an opening (311) and two vertical slots (313) at opposite sides of the opening. The fan module includes a fan (50) and a pair of clamp members (60). The fan has a fan opening corresponding to the opening of the bracket. The clamp members are respectively attached to opposite sides of the fan. An engaging portion (62) is formed on one end of each clamp member for engaging with the corresponding slot of the bracket. Each engaging portion has a wide portion (624) configured for abutting against an outer surface of one retaining walls and a narrow portion (622) for entering to the corresponding slot.