Organic food products have been on consumer tables for some time, but in the last few years there has been a noticeable trend of increasing consumption and thus their production. There are several reasons for this, from increased consumer concern for the environment, the planet and the climate to the fact that individuals no longer want to consume food of dubious origin that contains various pesticides and genetically modified organisms. In the Croatian professional literature, there is still not enough recent research that indicates the reasons why consumers behave in a certain way, i.e., there is not enough research that speaks to why individuals buy organic food products. As the most appropriate method of examining the behaviour of consumers of organic food products, Ajzen's model was chosen, i.e., the theory of planned behaviour, which for the purposes of the thesis was expanded in such a way that lifestyle, environmental opinion and perceived behavioural control were set as components that drive consumers to choose organic food products. This was examined with the help of a survey form and tested with the help of the Cronbach Alpha coefficient, basic statistical measures, and the T-test and Pearson's correlation between variables.