A curved positioning and insertion instrument for inserting a guide wire into the femur has a curved guide tube with a distal end to be placed on the trochanter and/or the medial muscle and a proximal end for inserting a guide wire. The instrument also has a holding arm that links the guide tube to a handle. A positioning hook fitted with at least one correction bore for receiving the guide wire or another guide wire is arranged at the distal end of the guide tube. This structure makes it possible to easily insert further or additional guide wires relative to a reference guide wire.