Following an offense, various justice concerns arise, and people might support the punishment of the offender’s entire group to restore a sense of justice (even if the other group members are innocent). We hypothesized that support for collective punishment might increase along one’s justice concerns, and that such effect can be hindered by the group’s collective apologies. In three studies, third-party observers were presented with various cases of aggression and we measured (Study 1) or manipulated (Studies 2 and 3) their justice concerns. In all studies, the presence (vs. absence) of collective apologies was additionally manipulated. The results confirmed our hypothesis thereby increasing our knowledge of both the determinants of collective punishment and the potential effects of collective apologies.