Lathe cutter

The utility model discloses a cutter for a lathe, comprising a cutter body (1), a cutter block (2) and a clamping bolt (3). The cutter body (1) is composed of a cutter lever (11) of a long-board shape and a cutter head (12) fixed at one end corner of the cutter lever (11); the cutter block (2) is a squared column, a cutter lever groove (21) of an inversed-T cross section is arranged at one side of the cutter base; an elastic groove (22) in the same direction as the cutter lever groove is arranged at the bottom of the cutter lever groove (21); an extending column (23) of the cutter lever groove is arranged at the parallel face at one side of the cutter base which is adjacent to the face at which the cutter lever groove is arranged; the cutter lever (11) is arranged in the cutter lever groove (21) of the cutter block (2); the clamping bolt (3) is connected between the cutter block (2) at the two sides of the elastic groove (22). The utility model has the advantages of high strength, steel saving, and the cutter