This study aims to determine the effect of training, work environment and work discipline on the performance of millennial generation employees. Data collection techniques using a questionnaire distributed to 208 millennial generation employees. This research is quantitative by using multiple linear regression analysis. Data analysis methods used in this study are validity test, reliability test, classic assumption test, multiple linear regression analysis, T test, F test, and R test using SPSS (Statistical Package for the Social Sciences). Based on the results of the analysis conducted, it can be concluded that training has an influence on employee performance, this can be seen from the results of t arithmetic (8.872)> t table (2,353). In the work environment a positive effect on employee performance, this can be seen from the results of t arithmetic (9,981)> t table (2,353). Work discipline has a positive effect on employee performance, it can be seen from the results of t arithmetic (5.858)> t table (2,353). The results of data analysis show that simultaneous training, work environment and work discipline influence employee performance with a determination coefficient R2 of 0.822 meaning 82 percent of employee performance is affected by training, work environment and work discipline and the remaining 18 percent is influenced by other factors not included in the research model.