A medical positioning apparatus including a telescopic member extending between first and second ends and having an adjustable length； a support member for receiving an object； a base member securable to a base； a first joint mechanism movably securing the support member to the first end of the telescopic member； a second joint mechanism including a housing with a top portion directly rotationally connected to the second end of the telescopic member, and at least one side portion directly rotationally connected to the base member and movably securing the base member to the second end of the telescopic member, a locking device operatively connected to the first and second joint mechanisms and the telescopic member, the locking device operable between a locked position and a released position； and a lock activation device to unlock the locking device biased in the locked position.
