This study explores the relationship between overconfident Chief Financial Officers (CFOs) and earnings management. Through the lens of upper echelons and overconfidence theories, and using a large sample of 14,156 observations of US firms from 1999 to 2021 inclusive, our study finds that overconfident CFOs are positively associated with earnings management. We show that overconfident CFOs use earnings management to reduce earnings volatility, given that a smooth performance can release their financing pressure. In doing this, we rule out another possible explanation of overconfident CFOs engaging in earnings management to pursue high compensation. Our findings pass a series of robustness tests, including entropy balancing, the Difference-i...