This study is designed to empirically examine the relationships between a perception of justice(procedural justice, distribution justice, and interaction justice) in public personnel management and the union commitment. using a structural equation modeling. In order to do this study, the superior trust and the organizational trust are used as parameters. The study found that the perception for justice in the public personnel management have positive effects to both values of the organizational trust and the superior trust. Moreover, this study shows that superior trust is positively related to organizational trust. Finally, the perception of procedural justice, distribution justice, and interaction justice in the public personnel management is positively related to union commitment, mediated to superior trust and organizational trust as a parameter.