Tijekom 2018., 2019. i 2020. godine provedena su poljska istraživanja o utjecaju genotipa, godine i njihove interakcije na udio bjelančevina u ozimoj pšenici. U pokus je uvršteno trinaest genotipova ozime pšenice domaće i strane selekcije koje su zastupljene na domaćem tržištu. Pokus je postavljen u HAPIH - Centru za sjemenarstvo i rasadničarstvo na lokaciji Osijek (N 45°31̕, E 18°40´) u dva ponavljanja po blok metodi sa slučajnim rasporedom (RCBD) uz primjenu standardne agrotehnike za ozimu pšenicu. Cilj rada bio je utvrditi utjecaj genotipa ozime pšenice na udio bjelančevina kako bi genotipove grupirali u klase prema Pravilniku o ugovornim odnosima pri otkupu pšenice. Prema dobivenim rezultatima analize varijance za genotip, godine i interakcije genotip x godina dobivene su statistički visoko opravdane razlike (P<0,0). Prosječni udio bjelančevina trogodišnjeg istraživanja genotipova kretao se u rasponu od 11,5 do 13,4%. Dobiveni rezultati ukazuju na mogućnost izbora genotipova s višim bjelančevinama. During 2018, 2019 and 2020, field research was conducted on the influence of genotype, year and their interaction on protein content in winter wheat. Thirteen genotypes of winter wheat of domestic and foreign selection, which are represented on the domestic market, were included in the experiment. The experiment was set up in HAPIH - Center for Seed and Seedlings at the location of Osijek (N 45 ° 31̕, E 18 ° 40´) in two repetitions by Randomised Complete Block Design using with the standard agrotechniques for winter wheat. The aim of this study was to determine the influence of winter wheat genotype and year on protein content in order to group genotypes into classes according to the Policy on quality parameters and qualitative classes of wheat. Based on the results statistically high significant differences were found (P<0,01) among genotypes, years and genotype x year interactions for protein content. The average protein content of the three-year genotype study ranged from 11.5 to 13.4%. The obtained results indicate the possibility of selecting genotypes with higher protein content.