An object of the invention is to provide a banknote storing/feeding unit which is capable of effectively utilizing winding spaces of a drum and a reel, to increase the number of banknotes to be stored. The banknote storing/feeding unit includes the drum which winds and rewinds a banknote together with a tape, and the reel which winds and rewinds the tape on and from the drum. A guide body swinging according to winding and rewinding of the tape and the banknote on and from the drum is provided between the drum and the reel. The guide body has a guide passage that guides the tape and the banknote to be wound and rewound on the drum. The guide body swings centering on a supporting point located within a region parallel to a virtual line connecting a rotational center of the drum and a rotational center of the reel.