Objectives: To examine differences in eating habits of people with diabetes type 1 and type 2. To examine the relationship between dietary habits of people with diabetes type 1 and type 2 and their quality of life. Study Design: Study was conducted as cross-sectional. Participants and Methods: The respondents were people with diabetes type 1 and type 2 over 18 years old who came to control in April 2016 to the Department of Internal Medicine, University Hospital Center Osijek. Data were collected by anonymous questionnaire, in which respondents answered rounding questions of closed type. The questionnaire consisted of 15 questions. Results: The study shows that none of the people with type 2 diabetes is in the age group below 38 years, which is confirmed by other studies that type 1 diabetes occurs in younger people. The basic principle of proper food preparation and distribution of the food is in several meals throughout the day. According to the number of servings 50% of respondents state that they eat three main meals without snacks, 40% of respondents eat three main meals and two snacks and 10% of respondents connect meals in one main meal (lunch). The study showed that significantly more patients have complications from diabetes type 2 (p = 0.001), than those with type 1, which leads to the conclusion that those with type 1 have a better quality of life. Conclusion: Treatment with a proper diet and regular intake of meals are important factors of good glycemic control. The proper diet should be adapted to the individual according to his habits, daily schedule of work and financial capacities because the treatment of diabetes is an ongoing process.