The aim of this research is to investigate the effect of the Dealing with Homophobia Psycho-Education Program on homophobia levels of psychological counselor candidates. This research was conducted with a mixed model and utilized quantitative and qualitative methods. 2 (experimental and control groups) x 3 (pre-test, post-test, follow-up) research design which is a type of quasi-experimental design was used and content analysis was applied to the data obtained via interviews. The study was conducted with a total of 24 psychological counselor candidates, 12 in the experimental group and, 12 in the control group. The Homophobia Scale was used to determine the homophobia levels of psychological counselor candidates. The Dealing with Homophobia Psycho-Education Program was developed by the researcher. In order to determine the effectiveness of the program, The Two-Way Analysis of Variance with Repeated Measures was used. As a result of the research, it was determined that the Dealing with Homophobia Psycho-Education Program is effective in decreasing the levels of homophobia of the psychological counselor candidates. Also, according to the participant's views, it was determined that the psycho-education program was effective in decreasing homophobia and caused changes in attitudes. The importance and necessity of using the program on psychological counselor education are discussed.