OBJECTIVES:  Smoking is one of the leading risk factors in the development of several diseases worldwide. The aim of the study was to analyse the effect of the Law amendment among healthcare professional employees from the Heart Institute of the University of Pécc, and also to measure how it affected smoking behaviour. METHODS: The research was based on a cross-sectional study with quantitative methods. At baseline, N=161 employees were enrolled from the Heart Institute, University of Pécs. Of these, N=125 (72.67%) could be involved into the analysis. The subjects were asked to fill in a self-made questionnaire. The questions were centred around five topics: socio-demographic characteristics, smoking behaviour, environmental tobacco smoke exposure, awareness of negative effects for health and attitude related to control policy. The analyses were made with MS Office Excel 2007/2010 and SPSS software. The analyses include t-tests, chi square tests, linear regression, and ANOVA. RESULTS:  The main hypothesis that non-smokers give higher ratings for the effectiveness of the Law modification as opposed to smokers was proved with significant difference (P=0,0002368; P<0,05). A marked difference was also found with respect to the rating of passive smoking among smoker, and non-smoker healthcare professionals (P=0.01514, P<0.05). Tobacco use among smoker employees has not changed. While some of the subjects reduced the amount of cigarettes they smoked daily, others continued to go through the same amount. To summarise, no change has been recorded (P=1; P<0.05). CONCLUSIONS:  Smoking continues to be the main public health issue in our country, requiring continuous action in the future. Another Law amendment is going to be introduced by the government to control the packaging of the cigarette boxes. Further more extensive research should be conducted with a focus to measure the efficiency of the newer Law modifications.