Perfectionistic people set unrealistic goals and, when they fail to reach them, experience self-criticism and blame. Preliminary research revealed that perfectionism appears to be a characteristic of people who stutter (PWS) (Amster, 1995). The purpose of the present study was to explore perfectionism in PWS and to determine if a modified cognitive behavioral therapy approach alone and combined with Stuttering Modification could help reduce perfectionistic tendencies and stuttering behaviors. Degree of perfectionism and scores of stuttering severity were measured with eight adult PWS and compared at pre-treatment, mid-treatment, after 6-weeks of treatment, and at 15 weeks follow-up, after treatment was withdrawn. Initial open-trial testing showed promising results as perfectionism and stuttering severity were reduced and communication attitudes improved. CBT significantly reduced perfectionism by mid-point. Stuttering decreased significantly throughout all phases of the study. Possible implications are discussed.