The present study aims to examine the impact of leadership styles on organizational commitment at Jordanian banks. The study’s sample consists of (390) employees that will help answering the study’s questions and hypotheses; besides, the researcher developed a questionnaire for the detection of leadership styles dimensions (transformational leadership style, transactional leadership style ,and laissez faire leadership style) and the level of organizational commitment. The most important findings and conclusions of the research are: The arithmetic mean of the estimates of employees at Jordanian banks towards leadership styles were moderate. The arithmetic mean of the estimates of employees at Jordanian banks towards organizational commitment were moderate. Regression results indicates that there is statistically significant effect for leadership styles on organizational commitment at Jordanian banks. Besides transformational leadership style influence came first concerning the size of the effect.