The present invention provides a sheet feeding apparatus and an image forming apparatus which can suppress generation of sheet skew feeding by a simple configuration and a pair of side edge regulating portions 30r and 30l is provided opposite each other in a sheet storage portion in order to regulate positions of side edges in a width direction orthogonal to a sheet feeding direction of the stored sheet S. At least one of the side regulating plates 30r and 30l can be moved in the width direction, and abutting portions 301r and 301l are provided opposite each other on inner wall surfaces of the side regulating plates 30r and 30l to abut on side edges of the sheet S.