A suturing device for an endoscope includes a curved needle rotatably attached on the distal end of the suturing device. A rotary member is provided on the rotation axis of the curved needle for rotating said curved needle and a connecting arm connects the curved needle to the rotary member. The center of curvature of the curved needle is aligned with the rotation axis of the curved needle and engaging means are provided at least at the pointed end of the curved needle for receiving thread.