The present research tests an important motivational explanation for people's concern with procedural fairness by considering the influence of people's belongingness needs. We predicted that those individuals with a strong need to belong would care more about procedural fairness information and thus they would process that information more carefully, as compared to individuals with a weak need to belong. In Study 1, the need to belong moderated the relationship between the opportunity for voice and self-evaluations. In Study 2, the need to belong moderated the relationship between the opportunity for voice and organizational identification among employees of a multinational healthcare company. Study 3 extends this finding by demonstrating that people with a strong need to belong engage in more careful and systematic processing of procedural fairness information. Together, these findings provide important insight into understanding the motivations that underlie reactions to procedural fairness. Copyright © 2005 John Wiley & Sons, Ltd.