This invention relates to a bone fixation device, and more particularly to a bone fixation device being injectable with medical fillings, comprising: a hollow fixation part having a joining end at a proximal end thereof, and an injecting end at a distal end thereof a cover part being joined with the injecting end of said hollow fixation part a medical filling being forceable and/or injectable via the injecting end of said hollow fixation part and into said cover part, such that the medical filling is allowed to become lump-like after injecting.