Abstract: The present invention relates to a guide instrument which is adapted for use at operations for fixation of bone fragments at bone fractures, preferably femoral neck fractures, whereby the bone fragments are intended to be fixed relative to each other by means of at least two bone screws, whereby the guide instrument (1) is adapted for guiding a first and a second drill steel which are adapted for drilling passages in the bone fragments for the bone screws. The guide instrument (1) is designed to permit guiding of the drill steels, driving through of threaded front portions of the bone screws and guiding of uptapped or unthreaded rear portions of said bone screws.