This study examined the hypothesis that religiosity would be differentially related to six types of adolescent prosocial behaviour, and that these relations would be mediated by the prosocial value of kindness. Self-report data were collected from 142 high school students (63 per cent female; 91 per cent White; M age = 16.8, S =.80). Religiosity was a signifi cant positive predictor of kindness, as well as compliant, anonymous and altruistic prosocial behaviour, but not public, dire and emotional prosocial behaviour. Associations between religiosity and both compliant and altruistic prosocial behaviours were mediated by kindness. Direct and indirect paths were found between religiosity and anonymous prosocial behaviour. Thus, partial support was found for the mediational hypothesis. Discussion focused on the utility of distinguishing among different types of prosocial behaviours and on the role of religion and values in promoting moral education.Increasing concern among parents, schools, community leaders and policy makers regarding youth violence means that efforts to promote positive behaviours in teens are being welcomed (The Consortium on the Promotion of Social Competence, 1994). Given that most religions have teachings that emphasize care and compassion for others, religiosity (defi ned here as commitment to, identifi cation with and involvement in a religion or system of religious beliefs) is a potential positive infl uence on adolescent prosocial behaviour. However, relatively little research has examined relations between religiosity and prosocial behaviour, and it has been almost solely conducted using college-age or adult samples (e.g., Darley & Batson, 1973); hence, little is known about links between religiosity and prosocial behaviour, particularly among adolescents.Scholars have proposed several reasons why religiosity might have an impact on adolescent prosocial behaviour (Regnerus, 2003;Smith, 2003). For example, it has been suggested that religion is a form of social capital (Smith, 1999; King & Furrow, in press), provides opportunities for helping (Donahue & Benson, 1995;Youniss et al., 1999;Mattis et al., 2000;Bridges & Moore, 2002), acts as a source of social control (Annis, 1976;Batson et al., 1989) prosocial behaviours (Ritzema, 1979; Ellison, 1992). However, the most widely recognized mechanism by which religiosity might infl uence prosocial behaviour is through socialization of prosocial values (Ritzema, 1979;Batson et al., 1985;Benson et al., 1989; Bernt, 1989; Ellison, 1992; Wilson & Janoski, 1995;Smith, 1999;Youniss et al., 1999;Mattis et al., 2000). Specifi cally, religious texts (e.g., the Holy Bible, the Koran and the Talmud) and teachings (e.g., 'The golden rule') typically have a strong focus on doing good to others (Ritzema, 1979;Wuthnow, 1991). Firstly, the Holy Bible (1989 edition) makes mention of rewards associated with various caring behaviours such as giving alms (see Matthew 6: 3-4) and feeding the hungry (see , as well as punishments that follow lack of altruism (see ....