Patent ID: 7913997

Claim:
A sheet feeding device comprising a pick roller to be brought into contact with an uppermost sheet in a sheet bundle for drawing out the uppermost sheet and a push-up board for pushing up the sheet bundle to the pick roller, wherein the sheet feeding device further comprises: a first friction member located in a position at push-up board side opposed to the pick roller with the sheet bundle interposed therebetween so as to be brought into contact with a lowermost sheet in the sheet bundle; and a second friction member located in a position at push-up board side upstream in a sheet transferring direction and not opposed to the pick roller so as to be brought into contact with the lowermost sheet in the sheet bundle, and wherein the second friction member has a most protruding part which protrudes to the sheet bundle more than a sheet bundle side surface of the first friction member and a sheet bundle side surface of the second friction member is concave toward the sheet bundle, and a dynamic friction coefficient of the second friction member to the sheet is larger than a dynamic friction coefficient of the first friction member to the sheet and smaller than a dynamic friction coefficient of the pick roller to the sheet.