In a device (1) for monitoring and/or manipulating objects that are arranged in a cavity that can be accessed through a narrow opening, a tubular or hose-shaped insertion part (2) is provided, on which a flexible section (4) is formed, which can be controlled by a Bowden cable (5), the Bowden cable (5) acting on an actuating element (10) which is rotatably supported in a joint (11) which includes a joint socket (13) and a corresponding joint ball (12) that engages with the joint socket (13).