The phenomenon of self‐anger has been overlooked in the contemporary literature on emotion. This is a failing we should seek to remedy. In this paper I provide the first effort towards a philosophical characterization of self‐anger. I argue that self‐anger is a genuine instance of anger and that, as such, it is importantly distinct from the negative self‐directed emotions of guilt and shame. Doing so will uncover a potentially distinctive role for self‐anger in our moral psychology, as one of the strongest affective motivators for self‐change.