Disclosed is a multi-processor system causing no distribution loss of resources and having no defect inherent in a prior art concentrated management type system. The multi-processor system (e.g., a switching system) includes a plurality of processors each incorporating a function of managing a part (distributed resources) of all the resources, trying to grasp, when the resource is needed, at first this resource from the distributed resources managed by the processor itself and, if unable to grasp the resource, requesting other processor to grasp the resource needed.