A paper feeding device includes a first tray, a first elevation motor for moving up the first tray, a second tray for placing paper sheets, a second elevation motor for moving up the second tray, a separation plate disposed between the first tray and the second tray, an upper sensor unit and a lower sensor unit attached to the first tray, a light blocking plate attached to the second tray, and a controller. The paper feeding device has a tray parallel elevation mode in which both the trays are moved up in parallel in a state where the separation plate is removed.