An image pickup apparatus is provided with cameras and string-shaped members. The user is allowed to know working distances based upon the lengths of the string-shaped members. The optical axis direction of the camera is adjusted so that the leading edge of the string-shaped member is included in the viewing field of the camera, and the optical axis direction of the camera is adjusted so that the leading edge of the string-shaped member is included in the viewing field of the camera. Even in the case when no image-pickup object is present, by presuming the position of the image-pickup portion of the object, the working distance from the presumed position can be found by the string-shaped member. Moreover, since the string-shaped members are coupled to each other at the image-pickup position, the directions of the optical axes of the cameras can be determined based upon the extending directions of the string members.