The study targeted to access the impact of leadership styles on employee performance at commercial bank of Ethiopia. Leadership styles (transformational, transformational, laissez-faire and authoritative) practices and its effect on employee performance was the main objectives. Random sampling technique used to select research participants. 149 structured questionnaires were distributed and 140 usable responses were collected. Multifactor leadership questionnaire (MLQ form 5X) was used to measure leadership style practices and customer satisfaction, team work and achieve organizational goal was used to measure employee performance. Descriptive statistics and scale analysis were used to analyze data using SPSS .23 and Microsoft Excel 2016. Pearson correlation analysis and regression analysis were used to predict the relationship between leadership styles and employee performance. The finding shows that, transactional leadership is most practiced leadership style followed by authoritative, transformational and laissez-faire leadership respectively. Transactional, transformational and laissez-faire found to be positively correlated with employee performance but authoritative leadership found negatively correlated. The results recommend that leaders in CBE must practice transactional and transformational leadership behaviors but not authoritative leadership behavior