To enable a fan for dust suction and removing to be driven by high- speed rotation and make the entire power-driven cutter comparatively compact by connecting a centrifugal clutch to an output shaft for an electric motor and forming a small dia. pulley part and a large dia. pulley part monolithically on a clutch drum.

This power-driven cutter is equipped with a body part in which an electric motor is arranged, a cutting operation part 30 having a cutting tool 39 such as a cutter and a fan 50 for dust suction and removing for sucking/ removing dust generated through a cutting operation using the cutting tool 39. A centrifugal clutch 10 is connected to an output shaft for the electric motor for operation, and at the same time, a small dia. pulley part 21 and a large dia. pulley part 22 are monolithically formed on the clutch drum 11 of the centrifugal clutch 10. In addition, the cutting tool 39 is driven to rotate at a reduced speed by the electric motor through the small dia. pulley part 21 and a first belt 15, and at the same time, the fan 50 for dust suction and removing is driven to rotate at an increased speed through the large dia. pulley part 22 and a second belt 17.