Abstract: The present invention relates to an improvement of a MMCard case including a cuboid with at least one storage space formed, wherein, an opening facing outward formed on a side to allow the MMCard to be placed in; an edge strip formed at each outer lateral side of storage spaces, with grooves formed thereof; a hinge connector formed on both ends of each groove thereof; by inlaying hinge connectors into positioning holes formed on each shaft end of a dual-shaft, each dual-shaft thereby hinged at each groove, enabling the two cuboids rotating freely about the dual-shaft. Many cuboids can be hinged this way to fulfill requirement, thereby making it easy in keeping, filing, viewing, inlaying, and removing MMCards.