Abstract: Osteotom (1) for the removal of bone and of bone tumors, as well as of ligaments and fibrocartilagineous tissue, during surgery, comprising a pair of blades (3, 4) slidably coupled so that respective distal ends (31, 41) thereof be closable the one against the other for the removal of a bone fragment (O), pneumatic propelling means (6) for the blades (3, 4), and a trigger (11) for the operation of the propelling means (6) by a user (FIG. 5B).