In a dust collector, a main body includes a motor and a rotary fan. The rotary fan is to be driven by the motor to suck air from outside through an intake port provided at the main body. A receptacle unit configured to allow a battery pack to be attached thereto and an exhaust port configured to allow a dust bag to be detachably attached thereto are provided at the main body. A handle capable of being grasped and a belt fastening part configured to allow a belt to be fastened thereto are also provided at the main body. At an underside of the main body, a supporting surface is provided which is configured to allow the dust collector with the dust bag and the battery pack attached to the exhaust port and to the receptacle unit respectively to be placed thereon.