In the current paper, we explore the efficacy of a four-hour self-forgiveness intervention. Participants (N = 79) undergoing a routine alcohol treatment protocol were randomly assigned to an intervention or treatment as usual condition. Those in the intervention condition completed the self-forgiveness intervention. All participants completed measures of self-forgiveness, drinking refusal self-efficacy, guilt and shame over an alcohol related transgression. Participants in the intervention condition reported more positive gains on measures of self-forgiveness and drinking refusal efficacy as well as guilt and shame related to alcohol-related offenses. Implications of the self-forgiveness intervention for alcohol misusing populations are discussed.