An image feeding apparatus for feeding sheets by separating sheets one by
one by a separating device has a pickup arm and a stopper. The uppermost
document of stacking documents to be copied contacts and downwardly press
down the pickup arm, and then the pickup arm and the uppermost document
downwardly press down the stopper so as to make a passage of the uppermost
document. After the uppermost document passes through, the stopper ascents
by gravity in response to elevation of the pickup arm. The stopper can be
reliably operated by a simple and low-cost construction.