Ring member cutting device

Provided is a ring member cutting device that can satisfactorily cut out a ring member. The ring member cutting device is provided with a rod-shaped part (13), a pressing part (12) and a receiving part (11). A plurality of ring members (B) having an inner diameter increased by elastic deformation are inserted into the rod-shaped section (13) so as to overlap each other, and a first inclined section (13B) having a diameter larger toward the lower end and a lower end larger than the inner diameter of the ring members (B) is provided at the lower end of the rod-shaped section. The pressing part (12) presses the ring member (B) from the upper end to the lower end. The receiving section (11) has a mounting surface that is provided so as to face the lower end of the rod-shaped section (13) and on which the cut ring member (B) is mounted. In addition, the size of the gap between the lower end of the first inclined part (13B) and the carrying surface of the receiving part (11) is freely changed in the vertical direct