A medium handover device is provided including: a fixed peripheral side section that covers portions of side faces enclosing a periphery of a collection space in which a paper sheet shaped medium is collected, other than at least a portion of an opposing side face opposing a medium support section supporting the medium inside the collection space, which portion is open, and other than at least a portion of an adjacent side face adjacent to the opposing side face, which portion is open; a lid section that has a shape covering portions of the side faces enclosing the periphery of the collection space that are not covered by the fixed peripheral side section; a transition section that transitions the lid section to enable the lid section to adopt a closed state with respect to the fixed peripheral side section in which the lid section is close to or abutting the fixed peripheral side section and the collection space is closed, and to adopt an open state with respect to the fixed peripheral side section in which at least a portion of the lid section is separated from the fixed peripheral side section and the collection space is opened; and a transfer section that transfers the medium between an interior and an exterior of the collection space.