A medical expanding apparatus is disclosed that can separate adhered neural tissues or muscle tissues. The apparatus includes an expanding member, an air tube, a connecting part, a body, and a front cover. The expanding member is expanded in the human body using air pressure. The air tube, whose one end is coupled to the expanding member, holds the expanding member and guides the air into the inside of the expanding member. The connecting part, whose one end is fitted into the other end of the air tube to be tightly coupled to the air tube, guides the air into the air tube. The body has an air inflow pipe and transfers the air flowing in through the air inflow pipe to the connecting part in order to expand the expanding member. One end of the body is coupled to the other side end of the connecting part. The front cover, coupled to the one end of the body, closely couples the connecting part and the body, so that the body holds the connecting part. The apparatus allows the expanding member to be stably expanded and prevents the air tube from being torn or damaged.
