To provide a common use connector for memory cards having standards different from each other, and switching and decision method of common use terminal for the same.

A common-use connector for asynchronously inserting and setting a variety of memory cards of different standards is utilized. The common-use connector has a number of rows/sets of contact terminals of different standards arranged on a base board of single side surface. The contact terminals has a common contact terminal and simultaneously decides the interface signal of SM card or SD/MM card, and connects them to exact SD/MM card interface signals or SM card interface signals through a corresponding memory-card insertion detection switch and its switching selection circuit. Thus, a memory card support for a number of standards is achieved, while reducing the size of the common connector.