To provide a bench cutting machine provided with a dust collector that is removably attached to the bench cutting machine and runs only when the bench cutting machine is operated.

To the cuttings discharging port of the circular saw part 12 of the bench cutting machine there is fitted the attachable/detachable dust collector 37 and the proximity switch 43 is installed for the dust collector 37. On the back of the circular saw part holder there is fixed the tube 45 that can freely be changed in its shape and keep that condition, and its tip is fitted to the actuator 44. When the circular saw part 12 is pushed down at cutting, the proximity switch 43 and actuator 44 separate, the proximity switch 43 turns ON and the dust collector 37 operates. When the circular saw part 12 is pushed up, the proximity switch and the actuator 44 are put into contact, the proximity switch 43 comes in a state of being OFF, and the dust collector 37 stops.