Patent ID: 8408534

Claim:
A medium feeding device comprising: a placing plane on which a medium to be fed is placed; a first feeding unit which feeds the medium to be fed which is placed on the placing plane to a downstream side of a feeding direction; a second feeding unit which feeds the medium fed by the first feeding unit to a upstream side and a downstream side of the feeding direction on the basis of a feeding direction of the first feeding unit; a friction member which is installed at a position of the placing plane which is opposite to the first feeding unit; and a displacement member which is able to be converted between a first state in which the displacement member protrudes upwardly in a stacked direction of the medium to be fed with respect to the friction member and a second state in which the displacement member retracts downwardly in the stacked direction with respect to the friction member, wherein the displacement member is set as the second state when one remaining sheet of medium to be fed placed on the placing plane is fed to the downstream side of the feeding direction by the first feeding unit, and the displacement member is set as the first state when a tailing end, which is an upper end thereof in the feeding direction, of the one remaining sheet of medium to be fed passes through the friction member and then the medium to be fed is reversely fed to the upstream side of the feeding direction by the second feeding unit.