Introduction and objective:
Obesity as a civilization disease is one of the largest threats for the contemporary population. It is a crucial salubrious, social and economic problem. The aim of the study is evaluation of the nutritional habits and identification of differences between dietary behaviours of males and females.

Material and Methods:
The study was carried out in 2011 among 100 obese patients (64 females and 36 males). The tests were carried out in several stages: elaboration of a survey testing the nutritional habits, pilot and final study, and elaboration and analysis of the results obtained. The results were analyzed using the Diet 4.0 and STATISTICA 10 software.

Results:
The recommended number of 4–5 meals daily was consumed by 32% of the patients examined, and 37% of them consumed meals regularly. As many as 36% of the respondents drank milk daily; 23% consumed meat and cold cuts 3–4 times a week; 74% ate fish once or twice a week; 64% of patients consumed fruit and vegetables daily; 40% did not drink sweetened beverages, or drank them only occasion; 37% ate sweets several times a week; 60% of the patients used salt to season their dishes – 40% used Vegeta, and only 55% used natural spices.

Conclusions:
The dietary habits of the tested group of patients were inadequate. There is a necessity for pursuing widely understood nutritional education, which would both prevent the development of obesity and help in the struggle against it.