PURPOSE: To enhance the working ability in a universal paper feed container for an electrophotographing unit, or the like, by constituting a stored paper positioning member with a line guide member and an end guide member, and as well by enabling characters for indicating the size of papers on the floor to be observed.

CONSTITUTION: A line guide member 8 is set so that it slides on a bottom plate 4 crosswise of the direction in which a copying paper 1 is fed and so that a display character indicating a predetermined paper size may be observed through a displaying groove 14, and then, an end guide member 9 is slid back and forth in the direction of paper feeding so that it is located in the position where the display character may be observed through a display window 20. With this arangement, the size of papers may be indicated and checked, simultaneously with setting of papers, so that errors in the size of the papers may be prevented thereby the working ability may be enhanced.