Abstract: A waste paper basket comprises a body, a lid, a pedal unit, a basket base, a pivotal portion, a fixation portion and a handle. The pedal unit comprises a pedal and a linkage; the basket base comprises a base, a roller and a supporting base plate; the body is fastened on the basket base; the lid is sleeve jointed to the body; the linkage is connected to the pedal and the fixation portion; the handle is plugged into the pivotal portion, which is connected to the fixation portion and assembled on the external periphery of the junction of the lid and the body. A roller cap passes through a hole of the body and then is sleeve jointed to the roller. It is possible to place waste bags inside the roller of the waste paper basket in advance, so that when the waste bag on the supporting base plate is taken out for disposal, a new waste bag is drawn out from the roller along with the old waste bag.