NOVELTY - The heat exchanger has two header tanks (210, 220) combined with ends of a pipe (100) along a longitudinal direction. An entry pipe (310) supplies heat exchange media to an inner side of the pipe. An outlet pipe (320) ejects the heat exchange media. The pipe is contact with two sides of an electrical device. An electrical device cooling heat exchanger unit (1) is arranged in an upper surface pre-determined portion of the pipe. The header tanks are brazing-combined with each other. The entry pipe is fixed in one of the header tanks. The outlet pipe is fixed in other header tank.    USE - Cooling heat exchanger for an electrical device of an integrated circuit device that is utilized for an inverter e.g. motor drive inverter and air-conditioner inverter, of a vehicle e.g. hybrid vehicle, fuel cell vehicle and electric vehicle.    ADVANTAGE - The pipe is contact with the sides of the electrical device and supplies cooling water to the electrical device so as to effectively cool heat generated in an integrated circuit device. The pre-determined portion of the pipe is bent for contacting the sides of the electrical device so as to conveniently perform insertion of the electrical device, so that cooling performance and assemblability of the electric device. The sides of the pipe flow the cooling water that is contact with the electric device so as to improve cooling capacity of the electric device. The heat exchanger protrudes a bent spot to an outside and forms a round section in the pipe so as to prevent damage of the pipe during bending process of the pipe and reduce contact thickness of the electrical device. The pipe predetermined portion is pressurized with a clip joint in the electrical device so as to steadily compress the electrical device. The heat exchanger is simple in structure so as to reduce occupying space in an inside-vehicle and perform peripheral component arrangement in the inside-vehicle. The header tanks are assembled with a decoupling-type heat device so as to reduce variation possibility of the heat exchanger and conveniently assemble the heat exchanger.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of a cooling heat exchanger.    Electrical device cooling heat exchanger unit (1)    Pipe (100)    Header tanks (210, 220)    Entry pipe (310)    Outlet pipe (320)