The present invention relates to a positioning device (100, 100′, 100″) for securing an intramedullary nail (19) in a long bone, said positioning device comprising a guide bow (1), with an adjusting device (3) and a sleeve guide (2), wherein the adjusting device (3) has a targeting device (5); and wherein the targeting device (5) is designed to receive a locking device (21) or an instrument (23) for acting on the locking device (21); and wherein the sleeve guide (2) has a sleeve (7), which sleeve (7) is mounted in the sleeve guide (2) such that it can be rotated and/or slid relative to the sleeve guide (2); and wherein the sleeve (7) has a longitudinal through-opening for receiving a guiding device therein.