Abstract: A thermal module includes a base for contacting with a heat-producing element, a radiating fin assembly consisting of a plurality of stacked radiating fins, a heat pipe having an end connected to the base and the other end extended through the radiating fin assembly, and a fan mounted to one side of the radiating fin assembly. Each of the radiating fins includes a flat main body having a first and a second transverse edge, and at least one projected portion provided on at least one of the first and the second transverse edge. Positions on the first and/or the second transverse edge without the projected portion are open portions. The projected portions on two adjacent radiating fins are staggered, so that a plurality of expanded heat dissipating spaces can be formed on the radiating fin assembly to enable smooth flowing of heat-carrying airflows and upgraded heat dissipating efficiency.