The paper analyzes the size of the gender pay gap (GPG) in the specific enterprise. The goal of the paper is to identify factors which could explain a possible wage difference between men and women, and to find out if there exists a wage discrimination of women or not. In order to estimate the discrimination, part of the GPG was used with the Oaxaca-Blinder decomposition. The authors conclude that wage discrimination of women really exists here. Different characteristics of men and women explain only - 16.5% to 6.2% of GPG. The rest of the GPG can be labelled (with a bit of simplification) as the effect of discrimination.