PURPOSE: To provide an ultrasonic diagnostic device that uses a general-use ultrasonic probe and realizes down-sizing.

CONSTITUTION: The ultrasonic diagnostic device is provided with multiple ultrasonic wave generating elements 2 that generate a diagnostic ultrasonic wave, an umbrella-shaped frame 1 which converges the ultrasonic wave generated from the multiple ultrasonic wave generating elements 2 to form a focal point, and an extendible column-shaped probe adaptor 3 which is attached in the axial direction and axial-rotatably inserted into the opening of the frame 1 and at the top of the adaptor, an ultrasonic probe 4 transmitting and receiving an ultrasonic wave for imaging is detachably connected to.