Patent ID: 7344545

Claim:
A treatment device that is elongated in an axial direction and which is used together with an endoscope to perform treatment in a body by being operated outside the body, comprising: a needle which is used to puncture a living tissue and to which a thread for suturing the tissue is fixed; a recovery member capable of recovering the needle inserted into the tissue, the recovery member having an outer periphery portion at which a groove is provided, and an inner hole; a guide formed in an elongated and tubular shape and capable of guiding the recover member; an elongated circular member capable of being inserted into the guide; and at least one arm provided at a distal end of the elongated circular member, the groove having an annular form, and being engageable with the at least one arm at a plurality of points, wherein when the groove and the at least one arm are located in the guide, the recovery member and the elongated circular member keeps an engagement with each other, and the recovery member is movable in the guide only in the axial direction by the elongated circular member.