PURPOSE: To efficiently cut a workpiece by a handy type ultrasonic cutter.

CONSTITUTION: The basal end of a cutter 3 is positioned on the same axis therewith against the axial center (a) of the fitting hole 4a of a handle body where the cutter is fitted and the middle part thereof is extended with an interval (b) from the axial center (a) in parallel therewith and further, the front end thereof is bent to the counter side against the axial center (a), in a handy type ultrasonic cutter device 1 using a long cutter 3. The front end and the middle part of the cutter 3 are positioned on the opposite side to the axial center (a) and the front end of the cutter 3 is apt to return onto the axial center (a) and hence, the deviation from the gravitational center of the cutter 3 results in only a little shift. Accordingly, it is efficient against any load.