Abstract: | The prosocial personality trait of honesty‐humility has received extensive attention in the last decade. However, research on the mechanism underlying the relationship between honesty‐humility and prosocial behavior is rather scarce. This study aims to explore the internal mechanism underlying this relationship to draw a complete picture of the honesty‐humility trait. A sample of 458 Chinese young adults was obtained to complete self‐report measures of honesty‐humility, perspective taking, guilt‐proneness, and prosocial behavior. The mediation model revealed that: (1) honesty‐humility positively related to prosocial behavior; (2) perspective taking and guilt‐proneness mediated the relationship between honesty‐humility and prosocial behavior, separately; and (3) the effect of honesty‐humility on prosocial behavior was mediated via perspective taking and then guilt‐proneness. In conclusion, we provide an initial support for the mediating roles of perspective taking and guilt‐proneness in the relationship between honesty‐humility and prosocial behavior. Both theoretical and practical implications for understanding the psychological mechanisms of prosocial behavior are discussed. |