To provide a paper feeding device certainly separating and handling paper having high smoothness by blowing strong air on a paper bundle, preventing the occurrence of double-feeding, and capable of corresponding to various paper.

The paper feeding device comprises a paper feeding means 60, a first blowing means 40 blowing air on a side end of the paper bundle, and a paper side end regulating member 71. A blowing port 72 for blowing the air on the side end of the paper bundle, and an air discharging port 73 discharging the air collecting between the paper bundle and paper separated from the paper bundle are provided on the paper side end regulating member 71.