The present invention relates to a device for fixation of bone fragments at bone fractures. The device comprises at least two fixation means (1) and a securing plate (17). The securing plate (17) has threaded holes (19). The fixation means consist of bone nails (1) which each comprises a sleeve (5) with a displaceable pin (7) inside the sleeve. A forward portion (9) of the (7) pin defines a first fixing portion for fixing the bone nail (1) in an inner bone fragment (3). A threaded rear end portion (18) of the sleeve (5) defines a second fixing portion for locking the bone nail (1) to the securing plate (17). The sleeve (5) has a middle portion (32) along which the outer bone fragment (2) can slide inwards towards the Inner bone fragment (3). The thread of each threaded hole (19) in the securing plate (17) is configured such that after screwing of the threaded rear end portion (18) of the sleeve (5) into the threaded hole until it reaches a surface in the hole against which said threaded rear end portion can abut, a side aperture for the pin (7) in the sleeve is oriented in a predetermined direction in the inner bone fragment (3).
