Abstract: Constructing to include a memory section and a share management section that divides a storage area of a storage apparatus attached to the memory section and allocates the divided areas to each plurality of information processing apparatus, thereby enabling sharing of the storage apparatus by the plurality of information processing apparatuses, carries out a memory access to the storage area on the basis of a memory access request signal from the each information processing apparatus, and generates a response signal from the memory section, thereby allowing the storage apparatus to function as an internal storage apparatus of the information processing apparatus, enables easy modification of the memory size used in an information processing apparatus by sharing memory which is provided external to the information processing apparatus among a plurality of information processing apparatuses, thereby facilitating effective use of the memory.