This study explores the effects of peer tutoring on the English writing skills of third-grade students at SMA Muhammadiyah 1 Banda Aceh. Through interviews and observations, the research identified both positive and negative impacts. The findings indicate that peer tutoring enhances students' enjoyment of learning, understanding of the material, confidence, peer relationships, and writing skills. However, challenges such as unfamiliarity between students, distractions during sessions, and ineffective tutoring when both peers lacked understanding were also observed. Despite these challenges, the overall benefits of peer tutoring, especially in improving writing skills, outweigh the disadvantages.