The purpose of the current study is to find out the impact of religious orientation on the prosocial behavior of undergraduate university students. The sample consisted of 528 undergraduate students (279 female, 249 male), who were purposefully selected with an age range of 17 to 24 years. Three scales were employed: the Religious Orientation Scale (Urdu) developed by Khan, Ghous, and Malik (2016), the Prosocial Tendency Measure (PTM-R) by Carlo and Randall (2002), and the emotional expressivity scale (Urdu) developed by Fahd and Hanif (2019). SPSS (22.0) is used to draw the results. This study provides important insights into the relationship between religious orientation and prosocial behavior and highlights the role of emotional expressivity as a moderator in this relationship. The results suggest that individuals who are more religious and also score highly on emotional expressivity may be more likely to engage in prosocial behaviors. This has implications for understanding the mechanisms underlying the relationship between religious orientation and prosocial behavior and may inform interventions aimed at promoting prosocial behavior.