A cooling device for cooling heat generating elements in which a cooling effect is produced by collision of a coolant with the back face side of the heat-generating elements. The coolant can be introduced into a coolant introduction chamber and is then introduced into a first coolant contact chamber by injection from a central nozzle. Thereafter the coolant produces a cooling effect in a second coolant contact chamber and in a third coolant contact chamber. Peripheral nozzles are formed so as to spread in radial fashion about the central nozzle and to provide uniform cooling of the back face side of the heating-generating elements.