An ultrasonic diagnostic device (10) has a probe holder (38) that is mounted on a side surface of a device main body (12). The probe holder (38) holds a probe head (34) of an ultrasonic probe. The probe holder (38) can rotate around an axis line that extends in the left-right direction and can be stopped in a desired position. The orientation, with respect to the device main body (12), of the probe head that is held by the probe holder (38) can be altered.
