Client violence is a prototypical work violence that occurs in the social work services and medical health fields. Client violence in the social work field is becoming a regular and normal work experience for social workers. However, if client violence is neglected as it is, serious loss and aftereffects will occur not only for social workers, but also social service institutions and clients. Client violent prevention education is necessary to prevent client violence, respond effectively, and minimize damage from violence. This research aims to develop a client violence prevention education program for social workers and evaluate the program’s effectiveness. A client violence prevention program was developed through literature review of similar foreign education programs, FGI with social workers and social work education professionals and 312 surveyed the program needs and developed a 20hour client violence prevention education program consisting of 9 subscales. A quasi-experimental design was used to compare the before and after results of the control and experiment group in order to evaluate the effectiveness of the program. The results showed that there was a significant difference between the experimental group and the control group in terms of violence prevention, coping knowledge and self–efficacy. Implications for social work education and directions to improve client violence prevention education programs were proposed based on these results.