In investigating purchases of consumers familiar with organic food products, emphasis must be placed on the psychological and socio-economic factors determining their purchasing attitudes. To this end, the present study is undertaken as an investigative research, based on psychometric methods. Regression analysis is then used to assess the importance of each investigated factor. The most important factors in actual organic food purchases are found to be: familiarity with organic food enhanced by the conception of differences existing between organic and conventional food and the thoughtful way consumers purchase their food products. The increasing variety of organic products and organic certification labels are also important.