(Title in Ukrainian - 'Vplyv zaprovadzhennia nakopychuvalnoi skladovoi derzhavnoi systemy pensiinoho strakhuvannia na pidvyshchennia rivnia sotsialnoho zakhystu naselennia v Ukraini'). The influence of introduction of accumulation constituent of the state pension insurance system in Ukraine on increase of the social protection level of both, persons of retirement age and the population on the whole, was investigated. Reform of the system of pensions provided today is one of basic trends of perfection of the general system of social protection of population in Ukraine. Priority given to the pension reform is conditioned upon many factors, in particular the population ageing, enhanced immigration and change of social values. A short review of certain stipulating factors speeding up the necessity of cardinal changes, in particular in the field of pension insurance is presented.