Abstract: Method for positioning a viewing axis in relation to a distal fixation hole (2) for an intramedullary nail (1). A rigid support (3) is fixed to the proximal end of the nail (1). An adjustable viewing device (9) is mounted on the rigid support (3). A coarse adjustment is done of the length of the rigid support according to the length of the nail (1). A coarse adjustment is done in order to move the viewing device (9) closer to the nail, taking account of the patient's build. A precise adjustment is done of the position of the viewing device in relation to the nail, involving the translational and/or rotational movement of the viewing device in a plane perpendicular to the longitudinal axis of the viewing device (Z).