Patent ID: 8066554

Claim:
A dust box comprising: an attachment portion configured to be attached to a dust-discharging nozzle extending from a housing of an electric tool; and a dust-collecting portion connected to the attachment portion and configured to store dust particles to be discharged from the nozzle, wherein the dust-collecting portion comprises a box which is made of synthetic resin and configured to be detachably connected to the attachment portion, and a paper bag received in the box and configured to store the dust particles to be discharged from the nozzle, the paper bag comprises a bag body in the form of a square bottom paper bag having an opening, and a square-shaped cardboard portion having a central opening and bonded to the opening of the bag body, and an attachment groove is formed on an inner surface of the box adjacent to a front end of an opening of the box so that the cardboard portion is fitted into the attachment groove.