An electronic device is provided which may include a tray, an exterior cover, and/or a first hooking structure. The tray may be inserted or drawn to or from an inside via an opening of a housing of the electronic device, and may include a space for receiving a card. The exterior cover may be movably coupled to the tray. The first hooking structure may be disposed inside the electronic device, and may maintain a closed state of the exterior cover, and may release the closed state of the exterior cover in response to pressing of the exterior cover.