Floor panel, which, at least at two opposite sides, includes coupling parts with which two of such floor panels can be coupled to each other; wherein these coupling parts form a horizontally active locking system and a vertically active locking system; wherein the horizontally active locking system comprises a male part in the form of a downwardly directed projection and a female part with a seat open towards the top, which have horizontally active locking surfaces; and wherein the vertically active locking system includes a vertically active locking element, which forms part of an insertion piece provided in the female part; wherein the insertion piece is formed at least of the combination of a bottom part; a back part adjoining thereto and an elastically movable lock-up body directed downward with a free extremity, which lock-up body, by means of a hinge portion, is connected directly or indirectly to the back part.