It becomes possible to easily retrieve an imaging portion from the inside of a body. When receiving an external force from forceps (33), the gripping portion (22) causes a camera unit (11) to be displaced following displacement of the forceps (33) while maintaining a posture of the camera unit (11) with respect to the forceps (33), and, when receiving an external force other than the external force from the forceps (33), the gripping portion (22) causes the camera unit (11) to rotate with a contact point (61) as a center, or causes the camera unit (11) to rotate so that the contact point (61) is rotationally moved.
