Abstract: A cooling device including: a base block having a first length and a first thickness and having a mounting side on which a heat-generating body is installed along a first vertical direction. The cooling device further includes a pipe unit, including a tank buried at an opposite side to the mounting side of the base block for storing a coolant, and pipes which are connected to the tank and are parallel to one another. Heat radiation fins are disposed on the pipes in a state in which the pipes penetrate the heat radiation fins. The cooling device in which the tank is formed has a flattened shape and a smaller dimension along a first thickness direction of the base block than a height dimension along the first length of the block. Each of the pipes are connected to an upper position of the tank with respect to the height dimension.

Abstract: Providing a cooling device which can improve cooling performance though it is configured to be compact. A cooling device 100 includes: a base block 20 having a mounting side 21a on which a heat-generating body 10 is installed along a vertical direction; a pipe unit 30 including a tank 31 buried at an opposite side 21b to the mounting side 21a of the base block 20 and storing coolant 60, and pipes 32 which are connected to the tank 31 in a state of standing at a side of the tank 31 and being parallel to each other, and heat radiation fins 40 installed on the pipes 32 in a state in which the pipes 32 penetrate the heat radiation fins 40, the cooling device in which the tank 31 is formed to have a flattened shape with a smaller thickness t2 along a thickness direction of the base block 20 than a height h2 along the vertical direction; and the pipes 32 are connected to an upper position of the tank 31.