An ultrasonic diagnosis device wherein a movable mechanism for supporting an operation panel is configured so that the degree of freedom in the position and attitude thereof is increased. Specifically, a movable section comprises the operation panel, a base, an arm mechanism, and a display unit. The movable mechanism has a lifting mechanism and a horizontal movement mechanism. The horizontal movement mechanism has a layered structure. The layered structure has, stacked from bottom to top, a left-right slide mechanism, a forward-backward slide mechanism, a rotation mechanism, and a rotation limitation mechanism. The rotation limitation mechanism changes a rotation range according to a sliding position in the forward-backward direction.
