A cooling module has a heat generating body, a heat exchanger made of metal, and an insulating plate. The heat generating body has a heat dissipating surface. The heat exchanger has cooling surface facing the heat dissipating surface. The insulating plate has a first surface and a second surface. The insulating plate is interposed between the heat dissipating surface and the cooling surface on a condition that the insulating plate faces the heat dissipating surface and that the second surface faces the cooling surface. The insulating plate and the cooling surface are joined to be one body by a joining material. The heat dissipating surface and the insulating plate are in close contact with each other through an elastic member. The heat dissipating surface and the cooling surface are thermally connected to each other through the joining material, the insulating plate, and the elastic member.