Counseling is done to improve the knowledge of respondents. Counseling using video media has a real picture and liked the target. This study aims to determine the effectiveness of counseling using video and images of free sex knowledge in adolescents. The research method used quasi experimental design with Pretest-posttest control design design in this study there are two groups selected by simple random sampling. The population in this study is students of class XI In Vocational High School 1 Nawangan country Nawangan which amounted to 178 person. The overall sample in this study were 54 respondents, for each treatment group 27 respondents. The data were processed using computter program with paired T-Test to see the significance difference between pretest-postest of each counseling medium and Independent T-test to see the effectiveness between video and image media, significance level (p) ≤ 0.05. The result of the research shows the counseling using video media with the highest value of pretest 75, average 60,65. Posttest the highest value of 100 averages 81.02. Counseling using image media pretest value score highest score 87,5 on average 60,19. While the highest posttest value of 93.75 averaged 70.14. Pursuant to result of independent T-test obtained p value = 0,005, which mean p value smaller than α = 0,05. So there is a significant difference between video and image media extension.The conclusion of this research is counseling using video media more effective than image media in increasing free sex knowledge in adolescent. It is expected to increase the knowledge of free sex in adolescent In Vocational High School 1 Nawangan country Nawangan institutions using video as a media counseling.