An electronic camera system has an electronic camera and a cradle. The electronic camera includes an image pickup section that photoelectrically converts a subject image to generate image data, a first recording section that records image data, a first connecting terminal used for transmission/reception of data to/from an outside of the camera, and a camera controlling section that transfers the image data to the outside of the camera. The cradle includes a second connecting terminal constructed to be capable of engaging with the first connecting terminal, a cradle controlling section that transmits/receives data to/from the electronic camera, and a second recording section in which the image data transferred from the electronic camera can be recorded. Also, at least one of the electronic camera and the cradle further includes a transfer determination section which determines a possibility of transferring the image data based on predetermined authentication information.