In order to provide a medical image diagnostic apparatus in which a mechanism for drawing a top plate into a gantry can be connected to the top plate without the collision, a pin 17 is provided in an end portion of a top plate 70, and a hook 12 that is connected to the pin 17 is provided in the connecting mechanism 82 that is moved on a top plate receiving portion. According to a position of the connecting mechanism 82 on the top plate receiving portion, the position of the hook 12 varies to connect to the pin 17.
