Most of the research on the relationship between organizational citizenship behavior (OCB) and performance has been conducted at the individual level. During the past 10 years, however, group-level research on that relationship has begun to appear. This article meta-analytically reviews 38 independent samples ( N = 3,097) in which the relationship between OCB and performance was studied at the group level. The analyses in this study suggest a positive overall relationship between OCB and performance (ρ = .29), as well as the presence of several moderating variables. The theoretical implications of these findings are discussed, and some suggestions for future research are offered.