Ligating apparatus

A ligating apparatus for ligating a body tissue, comprising:

• a clip that has a pair of freely openable/closable arms extended from a clip base portion, and that ligates a body tissue with the arms;
• a clip holding member that has a communicating hole for causing the clip to be inserted thereinto;
• an operating wire that performs an operation of pulling the clip into the communicating hole;
• an inner sheath member that is configured to be extended to enclose the operating wire and that supports the clip holding member at an end of the inner sheath member;
• and
• an outer sheath member that is arranged to advance and retreat while covering the inner sheath member,
• wherein the outer sheath member changes a degree of opening of the pair of arms by causing the pair of arms to abut on an inner peripheral surface of the outer sheath member,
• wherein each of the pair of arms includes a first arm portion and a second arm portion which is connected continuously to the first arm portion via a bending portion, the first and second arm portions being arranged from a base portion side in order, and
• wherein when the outer sheath member is moved close to a clip side along the inner sheath member, so that the bending portions abuts against an inner peripheral surface end portion of the outer sheath member, the second arm portion is arranged at an inner side in a direction of a radius from the inner peripheral surface of the outer sheath member.