A cooling device includes: a heat receiver configured to transfer heat from a heat generation body to a refrigerant, a heat radiator that is connected to the heat receiver via a heat radiation path, and a return path that connects the heat radiator and the heat receiver with each other, in which the refrigerant is to circulate in order of the heat receiver, the heat radiation path, the heat radiator, and the return path and cause a gas-liquid two-phase change and cool the heat generation body, and in which the heat receiver includes a heat receiving plate which is in contact with the heat generation body and is configured to absorb the heat, and a heat receiving cover which covers a surface of the heat receiving plate and defines a heat receiving space.