A heat dissipation module for optical transceiver is provided. The heat dissipation module for optical transceiver includes a liquid cooling device, a casing assembly and an elastic fastener. The liquid cooling device includes a liquid cooling tube and a base, and the liquid cooling tube is in connection with the base. The casing assembly includes a top plate. The top plate includes a top surface, a bottom surface and an opening. The opening is through the top surface and the bottom surface. At least one part of the liquid cooling device is extended into the opening and protruded over the bottom surface. The elastic fastener is configured for fastening the liquid cooling device on the casing assembly, and the liquid cooling device is pluggably fastened to the casing assembly.