AbstractWe present a voice efficacy model to account for the effects of general self-efficacy, perceived team servant leadership, and perceived organisational support on voice behaviour. In particular, we predict that general self-efficacy, perceived team servant leadership, and perceived organisational support enhance voice behaviour via voice efficacy. We also examined the extent to which perceived organisational support moderates the effect of voice efficacy on voice such that the effect is stronger when perceived organisational support is high. Using data collected from 401 employees in 91 groups and 53 organisations in China and controlling for psychological safety, we obtained full support for our hypotheses.