Issues in the study of friendship across cultures were explored by reviewing a set of studies focusing on the friendships of Indonesian and United States youth. Four topics are considered: similarity of friendships across cultures, dimensions of friendships that vary across cultures, the utility of the individualism/collectivism dimension for explaining cultural differences in friendship, and methodological issues in the study of culture and friendship. Two studies are presented that address some of these issues. Although friendships of US and Indonesian youth are similar across many dimensions, the friendships of Indonesian youth appear somewhat less close, more centred on instrumental aid, less focused on enhancement of worth, and more extensive and less exclusive than those of US youth. These patterns are opposite to those that have emerged in the comparison of those in the US and other collectivist cultures, suggesting the need to modify models of collectivism and friendship. Finally, the authors advocate the use of multimethod and multiagent assessments, addressing issues of social class in cross-cultural comparison, and using a combination of quantitative and qualitative approaches to study culture and friendship. (Contains 4 tables.)