OBJECTIVES: The main goal of the research was to determine the knowledge and attitudes of pregnant women about influenza vaccination and to determine vaccination in Split. SUBJECTS AND METHODS: This cross-sectional study was conducted from March to July in gynecological clinics in primary health care in Split, Croatia. Prior to the start of the study, selected gynecologists were informed of the purpose and optional nature of the study, and the anonymity and confidentiality of patient data were guaranteed. With the approval of the Ethics Committee of the Medical Faculty in Split and the consent of the gynecologist, the research was conducted for the purposes of this thesis. The research was conducted through an anonymous and voluntary survey filled out by pregnant women in the waiting room of a gynecological clinic. 323 pregnant women were included in the study. RESULTS: The results of the research indicate insufficient knowledge of pregnant women about influenza vaccination and very low vaccination coverage (3.2%) in Split. There is no proven correlation between the knowledge and attitudes about influenza vaccination and the level of education and age. The main reason for not vaccinating pregnant women is the lack of information about the flu vaccine. The main source of information on influenza vaccination is radio, TV and the Internet. Doctors (gynecologists or family doctors) do not advise pregnant women enough about vaccination. CONCLUSION: Pregnant women have insufficient knowledge about influenza vaccination, and doctors do not inform pregnant women enough about vaccination. The research indicates the need to educate pregnant women and health professionals about the benefits of vaccinating pregnant women against influenza.