The present disclosure relates to a locking apparatus (100； 200) and a medical apparatus (10) including the same. The locking apparatus (100； 200) includes a stationary part (110), a rotating part (120； 220) rotatably provided to the stationary part (110), a locking part (130) provided to the stationary part (110) to restrict rotation of the rotating part (120； 220), and a fluid supply part (140) providing a fluid to the locking part (130) to allow the locking part (130) to restrict the rotation of the rotating part (120； 220). The locking part (130) is expanded or contracted according to manipulation of a user so as to selectively restrict movement of a rotating part (120； 220), so that a device (15) mounted on the medical apparatus via the locking apparatus (100； 200) can be easily rotated without much effort or can be firmly secured according to the intention of a user, thereby providing satisfaction in manipulation.
