Abstract: A memory heat-dissipating mechanism includes: at least two memory devices, a heat dissipater, and a plurality of screw components. Each memory device comprises two inter-cooperating heat-dissipating pieces and a memory module sandwiched between the two heat-dissipating pieces. The heat-dissipating pieces of each memory device are provided thereon with locking holes. The heat dissipater comprises a base, a plurality of heat-dissipating pillars extending from the base, and a plurality of fixing slots. Each fixing slot corresponds to the locking hole of each memory device. The top surface of the heat-dissipating piece of each memory device abuts against a bottom surface of the base of the heat dissipater. The screw components penetrate the fixing slots of the heat dissipater respectively to be screwed into the locking holes of corresponding memory device, thereby secure the heat dissipater. Via this arrangement, the present invention can dissipate the heat of the memory module.