An ultrasonic diagnosis device wherein, in order to reliably stop the movement of a display unit by a simple mechanism during transportation of the device, a display unit restraint mechanism is provided with: a fixed portion which has a receiving groove for receiving a handle main unit provided on the display unit; and a rotation portion which moves rotationally in relation to the fixed portion. When the rotation portion is rotated with the handle main unit received in the receiving groove, the upper side of the handle main unit becomes covered with a cover portion. In this state, a hook member protrudes outward from the rotation portion and is engaged with an upper end portion to serve as a strut.