A clip unit including: a clip main body having a first arm portion, a second arm portion, and a middle portion a pressing tube formed in a tube shape to be capable of accommodating the clip main body, the pressing tube being provided to deform the clip main body so as to make a distal end of the first arm portion and a distal end of the second arm portion to approach to each other, as the middle portion, the first arm portion, and the second arm portion are moved toward a proximal end side of the clip unit a locking portion configured to protrude from an inner circumferential surface of the pressing tube on the proximal end side of the pressing tube and a first locked portion configured to protrude from a lateral surface of the first arm portion.
