Cooling apparatus

A cooling apparatus boiling and condensing refrigerant, having a refrigerant tank portion having a heat generating element mounted on a surface thereof and adapted to store therein a refrigerant, a refrigerant diffusing portion for diffusing said refrigerant that boils by receiving heat from said heat generating element and a heat exchanging portion provided between said refrigerant tank portion and said refrigerant diffusing portion for executing heat exchange between said boiling refrigerant and a cooling medium and constructed, as a whole, by stacking a number of plate-like members, wherein

• a first openings that form part of refrigerant passages and second openings that form part of cooling passages are provided in those of said plurality of plate-like members which are used for said heat exchanging portion, said first opening portions being adapted to establish communications with internal spaces of said refrigerant tank portion and said refrigerant diffusing portion.