Previous research has indicated that social exclusion can result in people becoming more focused on themselves than on others, and this may reduce their likelihood of engaging in prosocial behaviour. However, the question of how to promote prosocial behaviour in people who have experienced social exclusion remains. This study comprised two experiments that address this question in the context of donation advertising. Experiment 1 examined participants' donation intentions after experiencing social exclusion in a ball-passing game. Experiment 2 followed the same design as Experiment 1, except that reallife donation behaviour was measured. Consistent with prior findings, our results indicated that those who experienced social exclusion displayed lower donation intentions (Experiment 1) and donated less (Experiment 2) than did those who did not experience social exclusion. However, when those who experienced social exclusion watched advertisements that only portrayed alienated people, they showed as much donation intent as those who did not experience social exclusion (Experiment 1) and ultimately donated more (Experiment 2). These findings indicate that social exclusion may increase an individual's tendency to help others who also are alienated.