A shredder equipped with paper feeder comprises a shredder unit including a pair of intermeshed cutting cylinders driven by a power source and a paper feeder, which paper feeder has a cover, a paper feeding tray on which paper sheets are set and held, a lifter unit pivotally mounted on a base of the paper feeding tray to be vertically movable, a first feed roller for feeding out multiple paper sheets from the paper feeding tray, a separator wall for controlling the number of paper sheets fed to approximately the number the shredder can shred at one time, a second feed roller for feeding forward the paper sheets passed by the separator wall, a control unit for feeding from the second feed roller a number of paper sheets not greater than the number the shredder can shred at one time, a third feed roller and fourth feed roller for nipping and transporting to the shredder the paper sheets exiting the control unit, and a control switch for controlling the operation of the first feed roller and second feed roller. The shredder with paper feeder enables a stack of document sheets to be automatically fed into the shredder and shredded in lots of a specified maximum number of sheets simply by setting the stack in the paper feeder.