A cradle is capable of supplementing convenience of a portable information apparatus such as a digital camera of which functions including an image display function and a removable medium are omitted. If the camera is mounted on a camera mounting section of the cradle, a camera connector is electrically connected to a cradle connector in synchronization with a mounting operation thereof. The control circuit contained in the cradle detects a connection of the camera, and automatically starts communication between them. The image stored in the internal memory of the camera is sent to the cradle side, and is displayed on a liquid crystal display.