In the present study, we examined whether collective efficacy, group cohesion (task and social), and perceived motivational climate (task-involving and ego-involving orientations) in a music ensemble predict instrumentalists' perceived conductor support. Ninety-one (N = 91) skilled high school instrumentalists participated in the study. To assess the variables, participants responded to a number of surveys during rehearsals. It was hypothesized that instrumentalists' perceptions of collective efficacy, group cohesion, and a task-involving motivational climate cultivated by the conductor would predict conductor support. Results showed that, collectively, these variables accounted for 46% of the variance in instrumentalist perceptions of a supportive conductor. Findings of this study may provide guidance on how conductors can create learning environments that instill a strong sense of support for their instrumentalists. (Contains 3 tables.)