Background; petai (Parkia speciosa) is a plant commonly grown and consumed in Southeast Asia, especially Indonesia, Malaysia, and Thailand. The main part of petai that is usually consumed is its seed, while the skin is removed, not used, and becomes waste. Objectives; to analyze 1) the potential for processing and utilizing petai skin waste (PSW) to be a source of antioxidants; 2) the antioxidant extraction process on PSW; 3) antioxidant activity, total phenol, and total flavonoids obtained from PSW; and 4) strategic steps for sustainability of PSW utilization. Materials and Method; this study used secondary data which obtained from literature review. Data was analyzed descriptively by describing and comparing the results of external research related to the utilization of PSW as an antioxidant source. Results; based on ethanol extraction results, PSW has higher antioxidant activity (250 mg/g) than the seeds and the leaf. Petai skin extraction process was carried out by solvent extraction method with various types of solvent. Antioxidant activity was determined by FRAP, ABTS, and DPPH method, while total phenol analysis was used Folin-Ciocalteu method and total flavonoid analysis using the colorimetric method. Based on the economic aspect, the utilization of PSW had a positive impact on the welfare of society, from the social aspect, the utilization of food waste could increase awareness, acceptance, and comfort for the community, from environmental and health aspects, waste utilization could reduce contamination and disease source. Conclusion; PSW had the potential as a source of antioxidants.