A thermal module includes a centrifugal fan (10), a fin assembly (20) disposed at an air outlet of the centrifugal fan and two heat pipes (30, 40). The fin assembly includes a plurality of fins (21) connected together. Each fin has a front surface (212) and a rear surface (213) opposite the front surface. An elongated protruding member (218) is formed on the fin and protrudes from the rear surface towards the front surface. A recessed concave (219) corresponding to the protruding member is defined in the rear surface of the fin. At least one slit is defined along the protruding member and communicates with the concave. The protruding member divides the fin into first and second fin portions (20a, 20b). The two heat pipes thermally interconnect the first and second fin portions with two heat generating electronic components, respectively.