While the role of unions as collective voice is well understood, how union members themselves voice their preferences within their union is not. This study represents an important step in understanding this critical dimension of the union–member relation. Using survey data from an Australian union, I investigate how union members voice dissatisfaction with their union. Union loyalty, perceived opportunities to voice, union responsiveness, and collectivist ideology predicted willingness to voice directly to the union. Perceived union support and instrumentality did not predict members’ willingness to voice directly to the union but were associated with other voice responses.