The personal values and professional ethical codes are primary resources for practicing psychological counselors. Ethical dilemmas occur when personal values and professional ethical rules are incompatible. We examined the trainee counselors' understanding of professional ethics. This qualitative study used vignette analysis with 68 undergraduate Turkish students. Using vignettes, the trainees indicated their approaches towards confidentiality, romantic relationships with former clients, curiosity, relationship boundaries, information sharing, self-disclosure, respect for privacy, and reports to third parties. Results revealed the need for ethics education and showed that many trainees would have difficulty with regard to identifying ethical dilemmas.