This paper investigates the relationship between corporate social responsibility (CSR) and the quality of financial reporting in the Korean market. The authors hypothesize that socially responsible firms are more likely to produce higher-quality financial reports, as they are less likely to engage in earnings management practices. Using discretionary accruals and real activity manipulations as proxies for earnings management, the study finds weak evidence supporting this hypothesis for the entire sample. However, sub-sample analysis reveals that the relationship is driven by environmentally sensitive firms and affiliates of large family-owned conglomerates (*chaebol*). In non-environmentally sensitive industries and non-*chaebol* affiliates, socially responsible firms show better quality financial reporting in terms of both discretionary accruals and real activity manipulations. The findings suggest that firm characteristics and operational environments significantly influence the relationship between CSR activities and financial reporting quality. The study contributes to the literature by providing evidence of higher-quality financial reporting for socially responsible firms in emerging markets and highlighting the importance of firm heterogeneity in this relationship.This paper investigates the relationship between corporate social responsibility (CSR) and the quality of financial reporting in the Korean market. The authors hypothesize that socially responsible firms are more likely to produce higher-quality financial reports, as they are less likely to engage in earnings management practices. Using discretionary accruals and real activity manipulations as proxies for earnings management, the study finds weak evidence supporting this hypothesis for the entire sample. However, sub-sample analysis reveals that the relationship is driven by environmentally sensitive firms and affiliates of large family-owned conglomerates (*chaebol*). In non-environmentally sensitive industries and non-*chaebol* affiliates, socially responsible firms show better quality financial reporting in terms of both discretionary accruals and real activity manipulations. The findings suggest that firm characteristics and operational environments significantly influence the relationship between CSR activities and financial reporting quality. The study contributes to the literature by providing evidence of higher-quality financial reporting for socially responsible firms in emerging markets and highlighting the importance of firm heterogeneity in this relationship.