The invention relates to a medical instrument (1) for sectioning, removing, and particularly modeling bones, cartilage, and the like, in particular for a nasal bridge osteotomy, said instrument including a chisel (2) with a shaft (2a) and a chisel blade (2b) installed on the distal end of the shaft. A medical instrument (1) that allows easy and precise guidance of the chisel (2) is characterized, in accordance with the invention, by a handle (3) on which the chisel (2) can be secured for holding and guiding.