This study examines the association between a firm’s audit committee legal expertise and the disclosure of key audit matters in the audit report. Using a sample of listed non-financial Taiwanese companies, we find a significantly positive association between audit committee legal expertise and the disclosure level of key audit matters. More specifically, when the company’s audit committee has at least one legal expert, or has a higher number or a higher proportion of legal experts, the audit report contains a greater number of words in the disclosure of key audit matters. This finding supports that legal experts tend to be more concerned about litigation risk and thus encourage a higher disclosure level of key audit matters. This study contributes to the literature by offering a new important determinant of key audit matter disclosure. The empirical results also have valuable practical implications.