<p><em>The multidimensional </em><em>construct </em><em>of organizational justice and organizational commitment has attracted longstanding attention and debate among </em><em>managers</em><em>, researchers and academic</em><em>ian</em><em>s. To achieve significant progress, studies in this area should be directed to investigate the two sides simultaneously, construct validity and substantive validity. </em><em>So that</em><em> the progress achieved can be balanced between the conceptualization and definition of the construct itself as well as the relationship and its effect on other constructs. Therefore, </em><em>current</em><em> study </em><em>intents to test the validity dan reliability </em><em>of </em><em>four-</em><em>factors </em><em>of </em><em>organizational justice </em><em>(FFOJ) construct, and to test</em><em> </em><em>its</em><em> effect on organizational commitment dimensions.</em><em> </em><em>The research respondents were </em><em>264 private employees and civil servants who studying in 3 graduate programs at University of Bengkulu</em><em>, choosen using stratified random sampling</em><em>. </em><em>Two-hundred-and-fifty-seven </em><em>respondents participated in the study. Data analysis </em><em>used</em><em> Factor Analysis, reliability test, and Hierarchical Regression Analysis (HRA).</em><em> </em><em>The conclusions of this study provide strong support for the </em><em>FFOJ</em><em> conceptualization. Of the 20 items </em><em>questionnaire</em><em> included in factor analysis, 19 items </em><em>loaded in </em><em>4 dimensions</em><em>, which is </em><em>distributive justice (4 items), procedural justice (6 items), interactional justice (4 items), and informational justice (5 items). The reliability </em><em>of all dimension are good</em><em>, with Cronbach 'Alpha (α) score greater than 0.7. Almost all dimensions of </em><em>FFOJ</em><em> affect the dimensions of organizational commitment, except the interactional justice that has no effect on the affective commitment.</em><em> Further investigation is</em><em> highly recommended so that organizational justice measurement becomes more workable in explaining the phenomena of justice in the daily life of the organization. The empirical evidence also further emphasize</em><em>d</em><em> the important role of organizational justice in order to foster, enhance, and maintain organizational commitment. Attempts to acquire employees with high organizational commitment will face serious obstacles when </em><em>the</em><em> employees still perceive </em><em>there is no </em><em>fair</em><em>ness</em><em> in the</em><em>ir</em><em> organization.</em><em></em></p><p><strong><em>Keywords: </em></strong><em>afective commitment</em><em>, </em><em>continuance commitment</em><em>, </em><em>distributive justice</em><em>, </em><em>interactional justice</em><em>, </em><em>informational justice; procedural justice</em><em>, </em><em>normative commitment</em></p>