Knowledge withholding intentions (KWI), defined as the likelihood an individual will give less than full effort on knowledge contribution. If every member withholds knowledge in a software development team, it results in poor project performance. However, little research has been conducted to investigate the factors that influence knowledge withholding intentions. The purpose of this paper is to develop a theoretical model based Social Cognitive Theory and extends it with Social Exchange Theory to analyze the antecedents of knowledge withholding intentions from personal cognitions and contextual factors. Furthermore, the contextual influencers are subdivided into dimensions of rational choice, normative conformity, and affective bonding with a comprehensive view. Through a survey of 227 participants who have experience in software development, task interdependence, procedural justice, leader-member exchange, team-member exchange were found to have negative influences on knowledge withholding intentions. On the contrary, knowledge withholding outcome expectations and knowledge withholding self-efficacy were found to have positive influences on knowledge withholding intentions.