Equine Assisted Therapy (EAT) is growing in popularity as an alternative to traditional talk therapy in treating a range of presenting concerns; however, there is little empirical research to support its use. In this study, the author added to the body of empirical literature on EAT’s impact on self-efficacy. This study was a single subject A-B-A-B design wherein the subject was a Caucasian 14-year-old girl participating in 8 sessions of EAT at a therapeutic riding center. The New Generalized Self-Efficacy (NGSE) scale was used to measure the subject’s perceived generalized self-efficacy. Results showed a significant increase in the subject’s NGSE scores over the course of 8 EAT sessions. Clinical implications and the need for further research are discussed.