A paper feeding apparatus for an image forming apparatus includes a first paper feeding roller to convey a print medium loaded in a first paper feeding tray; a first one-way rotation transmission member disposed coaxially on the first paper feeding roller to transmit a first one-way rotational force to the first paper feeding roller; a second paper feeding roller to convey a print medium loaded in a second paper feeding tray disposed to be spaced apart from the first paper feeding tray; a second one-way rotation transmission member disposed coaxially on the second paper feeding roller to transmit a second one-way rotational force to the second paper feeding roller; a drive source for generating a rotational force to rotate the first and second paper feeding rollers; a first power transmission member disposed between the first one-way rotation transmission member and the drive source to transmit power of the drive source to the first one-way rotation transmission member; and a second power transmission member disposed between the second one-way rotation transmission member and the drive source to transmit the power of the drive source to the second one-way rotation transmission member, wherein when the drive source rotates in one direction, the first paper feeding roller conveys the print medium from the first paper feeding tray by the first one-way rotation transmission member, and when the drive source rotates in an opposite direction, the second paper feeding roller conveys the print medium from the second paper feeding tray by the second one-way rotation transmission member.