The subject of this master's thesis is the study of the pension and health systems with the aim of determining whether the amount of pension affect the health system. With thesis are defined terms as social insurance, kinds of social insurance and sources of financing social insurance. Pension and health insurance, as most important kinds of social insurances are detail processed for getting knowledge of rights and obligations which are resulting from these insurances and methods of his financing. The master's thesis was written to determine whether the health system in the Republic of Croatia is funded from the pension system. For this reason, an insight into the Croatian legislative framework was conducted and an example of the calculation of pensions for insured persons with a pension lower than the average net salary and insured persons with a pension higher than the average net salary is presented. Also, it is made calculation of pensions according to the German model because most respondents are quote Germany as state with best health care system. The second part of the thesis deals with the analysis of the collected data by the survey method and is divided into two parts − Descriptive statistics and Inferential statistics. The data were collected by a questionnaire on a sample of 140 respondents who have the status of pensioners, regardless of the type and origin of the pension. Descriptive statistics analyzed the data obtained using statistical methods. Inferential statistics confirm or reject the hypotheses created. The major hypothesis was to determine whether the amount of pension affects the health system. Sub-hypotheses are created for testing on which part of health care system pension system has influence. With linear model of multiple regression is tested ability of apply set models on whole population. Thesis conclusion is that the amount of pension affects the financing of the health system and the efficiency of the health system, but not the frequency of use of health services, while the main component that affects the pension amount is the level of education.