A heat sink-equipped cooling apparatus capable of increasing a size of an air discharge port as compared with a prior art. A fan unit is mounted on a heat sink. The heat sink includes a base formed into a contour having first and second sides defined so that an angle therebetween is substantially 90 degrees. A side wall of the base and a casing of the fan unit cooperate with each other to provide an air discharge port at a position corresponding to sides of the base opposite to the first and second sides while being combined with each other. The air discharge port is constructed so as to permit air sucked through an opening to be discharged therethrough.