This study aims to identify the acceptability and effectiveness of peace guidance based on the perspective of Markesot. This model seeks to reduce student aggressiveness. This study uses the research and development stages by adapting the Borg & Gall model. The participants of this study were 275 students who were taken randomly. The study involved two guidance and counseling experts, guidance and counseling media, and product users to assess the acceptability of the product. Meanwhile, to test the effectiveness of the product, it involved 210 participants, both control and experimental groups. The data analysis technique used descriptive analysis to describe the level of aggressiveness. In addition, this study uses Cohens Kappa's interrater reliability (IRR) coefficient to identify expert and user agreement on product acceptability. The analysis of the product effectiveness test using the Independent Sample T-Test. The results of the descriptive study show that aggressiveness is a problem that needs the counselor's attention, one of which is by implementing peace guidance based on the perspective of Markesot. The peace guidance based on the perspective of Markesot has high acceptability and effectively reduces student aggressiveness. This study's results should be material and consideration for further research to identify the compatibility of the characteristics of the Indonesian people with Markesot figures.