This research is to clarify the Christian counseling ethics on a counselor's sexual misconduct. The researcher dealt with the meaning and the background of counseling ethics. The researcher also examined the realities and the evil effect of a counselor's sexual misconduct, cause and weakness of a counselor's sexual misconduct, and a Christian counselor's preventive device against sexual misconduct. The definition of sexual misconduct used in this study consists of sexual intercourse, sexual violence, sexual assault, sexual abuse, sexual harassment, sexual attraction, and various sexual behavior. Counseling ethics deals with a moral and ethical standard, which includes a counselor's attitude, guideline of conduct in counseling. The cases of sexual misconduct in counseling setting and also in Christian counseling setting have been reported frequently these days. A counselor's sexual misconduct breaks the trust relationship between counselors and clients. Counselors who committed sexual misconduct are mainly male. Counselors should maintain a psychological and physical safety-distance from clients. Also, counseling institutes, such as associations, academies, societies, and graduate schools, in which they issue license of counseling should provide education system and/or curriculum on Christian counseling ethics in detail. One who wants to be a Christian counselor ought to have biblical perspective on human and Christian self-identify.