A heat dissipating module includes a heat dissipating apparatus and a fan. The fan is disposed adjacent to a side of the heat dissipating apparatus. A heat dissipating apparatus includes a flat heat column and a plurality of heat dissipating fins. The heat dissipating fins are disposed at the exterior of the flat heat column. A flat heat column has a pipe-body and a base, and the pipe-body includes a circular sidewall, an open end and a closed end. The base is coupled to the circular sidewall at the open end to form a closed space in the flat heat column, wherein the circular sidewall converges from the open end toward the closed end to form a converging part and a flat part.