To provide an electric cutter for cutting a workpiece tiltably, easily, and accurately in accordance with its application.

This electric cutter 1 is provided with: a main body housing 2 incorporating a driving source; a rotary cutting edge 3 rotated and driven by the driving source; a protection cover 8 covering a part of the outer periphery of the rotary cutting edge 3; and a base 9 attached to the protection cover 8 turnably. An attachment 10 for tilting the rotary cutting edge 3 by only a predetermined angle in the vertical direction to a surface of the workpiece W to be cut is detachably mounted on the electric cutter 1.