PURPOSE: To perform a paper feed in a good condition, even in the case that a curl is generated in paper, by performing action of making one turn of a rotation separator device at each time of supplying one-side copying finished paper, and setting the one-side copying finished paper to a paper feed position.

CONSTITUTION: In a condition that paper Pa is pressed to a bottom roller 5 by a weight roller 32, while the paper is fed by the bottom roller, the next paper Pb is inserted from a carry-in path. The new supplied paper Pb is placed in a condition that it rides on the weight roller 32, but when information of paper stored in an intermediate tray device is input to a control device frown a paper sensor, action of rotating a rotation separator device 20 is performed. A point end part of the paper Pb is lifted by the weight roller 32 to press an intermediate part of the paper Pb by a tie rod 30, and while applying action so as to squeeze the point end part of the paper, action of positioning the next paper Pb on the paper Pa existing accumulated is performed.