1. An external storage device detachably attached to a hand-held type game machine provided at least with a data transmitter for transmitting data to an image composing apparatus, comprising: face image fetching programmed logic circuitry for fetching face image data; feature data fetching programmed logic circuitry for fetching feature data associated with the face image corresponding to said face image data; and data storing programmed logic circuitry for storing said face image data and said feature data in a manner that the both data are associated with each other, wherein the feature data is used by the image composing apparatus for image composition processing.