The topic of forgiveness is defined, presented in models, and reviewed in the present literature. Additionally, the existing measures of and research on forgiveness are discussed. The topic of self-forgiveness is presented through definitions and models, followed by an exhaustive presentation of self-forgiveness research. No measurements of self-forgiveness currently exist. This dissertation fills that void, by describing the development and validation of the 26 item Self-Forgiveness Scale. There were 113 participants, 40 were males, and 73 were females, all between the ages of 18--38 years. Convergent validity was examined through the use of the Unconditional Self-Regard Scale, while discriminant validity was examined utilizing the Balanced Inventory of Desirable Responding. Scree plot results indicated two factors. Internal consistency was found to be .90.