The present invention reduces noise generated when the X-ray detection unit moves up and down along the rail of the imaging stand and stops at a predetermined position. A medical diagnostic apparatus having a non-powerless noise-free one-touch brake device, the apparatus comprising: a first brake plate installed coaxially with a rotating plate which is installed at an upper end of a shooting stand and is connected to an upper and lower driving wires and is wound； A brake link bar having a second brake plate engaged with the first brake plate at an upper portion of the first brake plate, a pedal, and hingedly connected to a pedal and a support bracket installed on the bottom plate of the shooting stand. The footrest part having the foothold link and one end And a brake wire connected to the scaffold link and the other end connected to the brake link bar on the side opposite to the second brake plate, and when the user presses the pedal, the brake wire is pulled down while being pulled down. Accordingly, the brake link bar is rotated about the central axis to release the lock of the first brake plate and the second brake plate, and when the pedal is released, the first brake plate and the second brake plate are engaged to be locked so as to lock the conventional brake. Noise can be eliminated without the need for a basic electrical device in the brake system.In addition, since the first footrest portion and the second footrest portion are arranged on both sides of the shooting stand, the brake device can be locked / released regardless of which side the user presses the pedal according to the use state of the medical diagnostic apparatus. This becomes easy.본 고안은 촬영스탠드의 레일을 따라 엑스레이 검출부를 상하로 이동시킨 후 일정위치에 정지시킬 때에 발생하는 소음을 줄임으로써, 신경이 예민한 환자 또는 동물의 진단시에 동물이 정지시의 소음에 의해 놀라거나 하지 않도록 하는 무전력 무소음 원터치 브레이크장치를 구비한 의료용 진단기기에 관한 것으로서, 촬영스탠드내의 상부 끝단에 설치되며 상하구동부에 연결된 와이어가 감겨 회전하는 회전플레이트와 동축으로 설치되는 제 1 브레이크 플레이트와, 상기 제 1 브레이크 플레이트의 상부에서 상기 제 1 브레이크 플레이트와 맞물리는 제 2 브레이크 플레이트를 구비하는 브레이크
