A robot apparatus that performs the work of attaching a cable includes a gripper that grips the cable having first and second ends, the first end being fixed; an arm main body that guides the second end of the cable being gripped by the gripper to the interior of a guide area; a force censer that is provided on the arm main body and detects that the gripper has come into contact with the second end of the cable; a camera that captures an image of the guide area when the force center detects that the gripper has come into contact with the second end of the cable; and an image processor that detects the posture of the second end of the cable based on the captured image. The robot apparatus performs the work of attaching the cable in accordance with the detected posture of the connector.