The current study examines the interplay of individualism-collectivism and team composition in team cohesion. I propose that individualism generates greater cohesion in diverse teams than does collectivism, whereas collectivism generates greater cohesion in homogeneous teams than does individualism. The underlying reasoning is that team composition is a cue that provides verification of one’s self-construal, ingroup-construal, and diversity beliefs, and that such verification fosters cohesion in work teams. Two experimental studies that manipulate psychological states representing individualism-collectivism provide evidence for the proposition. Study 1 manipulated self-construal, with results showing that individualistic self-construal generates greater energetic feeling in diverse teams than does collectivistic self-construal, which in turn promotes cohesion. Study 2 manipulated ingroup-construal, with results showing that individuated ingroup-construal promotes greater cohesion in diverse teams than does depersonalized ingroup-construal. The results of Study 2 also reveal a mediating effect of diversity beliefs linking individuated ingroup-construal and cohesion in diverse teams. Theoretical and practical implications of such findings for teams and organizations are discussed.