CLIP UNIT AND ENDOSCOPE CLIP

A clip unit includes a pressing tube having a longitudinal axis and formed in a cylindrical shape; an arm portion having a first arm and a second arm, the arm portion being transitioned from a first open configuration to a second open configuration when a movement portion having at least one of the first arm and the second arm moves in a first direction along the longitudinal axis with respect to the pressing tube, the first arm and the second arm being separated from each other at a first distance in the first open configuration, and the first arm and the second arm being separated from each other at a second distance larger than the first distance; and a restriction portion configured to restrict movement of the movement portion in the first direction and restrict the arm portion from being transitioned from the first open configuration to the second open configuration by applying a force opposite to a force causing the movement portion to move in the first direction to the movement portion when the arm portion is in the first open configuration.