A roil of a recording paper is rotatably contained in a paper magazine. The magazine is provided with a mouth through which the recording paper is drawn out and fed to a printer. A leading edge of the recording paper is adapted to come into contact with an outer periphery of the roll by a contacting device. The remainder of the roll is indicated by an indicating device. The mouth of the magazine is opened and closed with a shutter unit. The inside of the magazine tightly closed with the shutter unit is kept at constant humidity by a humidity conditioning paper. On the other hand, the roll is caught between a pair of flanges. One of the flanges is biased by plate springs toward the other of the flanges so that the roll is held in the magazine without looseness.