<；P>；PROBLEM TO BE SOLVED: To firmly attach a heat conductive member to a circuit device mounted on a circuit board by a simple configuration in the transmission/reception circuit device of an ultrasonic diagnostic device. <；P>；SOLUTION: To a slave board 44 mounted on a master board, a clip 56 is fixed. The clip 56 is provided with a pressurizing piece 60 disposed so as to face the circuit device 46 mounted on the slave board 44 with a gap. In the gap of the clip 56 and the circuit device 46, the heat conductive member 52 thicker than the gap is received. By the elastic force of the clip 56, the heat conductive member 52 is pressurized to the circuit device 46 and they are firmly attached. <；P>；COPYRIGHT: (C)2008,JPO&INPIT
