PURPOSE: To hold on a frame, a band saw tooth, the driving roller thereof and a roller for imparting tension, and a driving shaft in a cutting tool shank shape, etc., also to fix this frame on the spindle head of a machine tool and to execute the automatic work of the curved face and the intermediate part having barriers at both sides, etc., with good efficiency.

CONSTITUTION: A band saw head for machine tool is composed of a band saw tooth driving roller 3, a roller 4 for a band saw tooth tension imparting, a driven roller 5, a saw tooth guide 6 and driving shaft 7 in a cutting tool shank shape by integrating them respectively. Also the band saw tooth 2 is incorporated in a belt shape between the driving roller and driven roller. Moreover a flange for fitting a main head to the spindle head of a machine tool is provided on the frame 1. The band saw tooth 2 is then driven by rotating the driving roller via the driving shaft 7 according to the rotation of thespindle in the machine tool. On the other hand, a saw cutting that a cut face becomes plane is executed by giving feed to the machine tool.