Abstract: A medium processing apparatus includes a conveyor, a tray, a binder, a mover, and a switcher. The switcher includes a first passage, a second passage, and a movable wall. The movable wall guides a guided portion of the binder to the second passage when the guided portion moving along the first passage from an end side to a center side contacts the movable wall; causes the guided portion to pass when the guided portion moving along the second passage from the end side to the center side contacts the movable wall; guides the guided portion to the first passage when the guided portion moving along the second passage from the center side to the end side contacts the movable wall; and causes the guided portion to pass when the guided portion moving along the first passage from the center side to the end side contacts the movable wall.

Abstract: A sheet feeding device includes a housing, a sheet stacker, a stacker elevator, an extension sheet stacker, and a support. The sheet stacker is included in the housing and is configured to stack a sheet. The stacker elevator is configured to elevate the sheet stacker. The extension sheet stacker is attached to the sheet stacker and is configured to extend outward from the housing. The support is configured to support the extension sheet stacker and has an inclined portion configured to diagonally extend in a sheet conveyance direction, to the housing from a position upstream from a center of the extension sheet stacker in the sheet conveyance direction, when viewed from a width direction of the sheet.