PROBLEM TO BE SOLVED: To reliably secure safety of an analyte in imaging.SOLUTION: A medical image diagnostic apparatus includes a structure, a driving mechanism, a tank, a nozzle and a control section. The structure supports a heavy object used for picking up a medical image. The driving mechanism moves on the structure. The tank contains a substance which increases friction. The nozzle is provided in the tank in such a manner that the substance can be jetted towards a portion where a driving force of the driving mechanism is transmitted to the structure. The control section opens the nozzle when detecting a movement of the structure which does not match a driving amount by the driving mechanism.
