Authors present problems concerning mass--casualty accidents, specificity of action rescue-system on different levels of co-operation, kind of segregation of victims and efficiency of the medical rescue system in Poland. Attention has been paid to the continuous instructions and education of life-saving services, preferably by simulation of events without earlier information of the interested. It is necessary to establish and abide official dependence by the rules of co-operation of components of life-saving system. A separate problem is the implementation of rescue--activities in special situations: nuclear, biological and chemical contamination, and with very important safety measures for people taking part in rescue action.