Purpose: The aim of the study was to analyse the frequency of consuming selected groups of food products among Polish handball players depending on their sports experience and level of generalised self-efficacy. Methods: The research was conducted among a group of 142 men aged 20-36, using an author-designed questionnaire regarding the frequency of consuming selected food groups and the Generalised Sense of Self-Efficacy Scale (GSES). Statistical analysis of the results was carried by estimating Spearman's signed rank correlation coefficients. Results: The examined handball players usually included the following in their diet: vegetables and fruits, and several times a week: refined and whole grain cereal products, milk and dairy products, eggs, poultry and pork meat, processed meats, sweets and confectionery products. Typically, once a week, they ate: sea fish, vegetable oils, nuts, fast food products, and sweetened carbonated beverages. It was shown that along with the experience in competition, the consumption of fruit and vegetables (p=0.045) and vegetable oils (p<0.001) increased, while consuming eggs (p<0.001) and fast food products became less frequent (p=0.001). A positive correlation was also found between the level of self-efficacy and the frequency of consuming vegetables (p<0.001) as well as milk and dairy products (p=0.004), and a negative correlation with the frequency of consuming eggs (p=0.049) and alcoholic beverages (p=0.007). Conclusions: In the studied group of Polish handball players, nutritional errors related to the low frequency of consuming whole grain cereals, dairy products and nuts, as well as a tendency towards more rational nutritional choices along with longer professional experience and a more intense sense of self-efficacy, were demonstrated.