This study investigates the relationship between job performance and affective, continuance and normative organizational commitment. A Turkish Military Forces' factory is chosen as the empirical study case. The study has found that employees have a middle level of affective, continuance and normative commitment. We have found no significant difference in the levels of affective, continuance, normative commitment to the organization based on the age variable. However, significant difference has been found in the levels of continuance commitment to the organization based on the experience variable. We have seen that employees have a high level of job performance. A positive relationship has been found between affective, continuance commitment and job performance, but no significant relation has been found between normative commitment and job performance.