Background: Adolescent pregnancy is a pregnancy that occurs at the age of adolescents or less than 20 years. Postpartum depression is a condition of severe depression that occurs within 4-6 weeks after giving birth. Objective: To explore the scientific evidence of obstetrics related to the incidence of postpartum depression in adolescent mothers. Design: scoping review using the PRISMA-ScR checklist Method: The authors use the Arksey and O'Malley framework. The article search used three databases namely PubMed, Proquest, and Science Direct covering from January 2012 to 2022. An assessment tool was used. Review selection and characterization were carried out using critical appraisal using the Joanna Briggs Institute (JBI) study tool. Results: Out of 809 potentially relevant articles, 7 articles were included. The research articles came from 5 different countries, and the methods were RCT, cross-sectional, and qualitative. The results are presented in three themes: the prevalence of postpartum depression in adolescent mothers, risk factors for postpartum depression in adolescent mothers, and the implementation of health services and obstacles in dealing with postpartum depression in adolescent mothers. Conclusion: Based on 7 articles reviewed, it was found that 32% of adolescent mothers have the possibility of postpartum depression that requires immediate action on early assessment, detection, and intervention. Factors that contribute to the development of postpartum depression in adolescent mothers include high social support, marital problems, pressure from parents, and economic problems. Continuing midwifery care, appropriate strategies, and preventive measures including regular screening for adolescent mothers and mental service providers are needed to reduce the risk of postpartum depression in adolescent mothers.