Syzygium jambos (L.) Alston is an evergreen tree that belongs to the Myrtaceae family. It is commonly found in the South-East region of Asia. The fruit of this plant is known as “Rose apple”, “Malabar plum” and “Golap-jam” in West Bengal (India). This fruit and its seed have beenObjective: used in Ayurveda from ancient times. Although it is not very popular as fruit among people. This study was carried out to identify the anti- nutritional factors (oxalate, phytate, alkaloids, tannin and saponins) present in the fruit and its seed. The total oxalate, phytate, alkaloid,Results: tannin and saponin content of Syzygium jambos fruit was found to be 4.54 mg/100g, 5.68 mg/100g, 3.53 mg/100g, 32.43mg/100g, 386.49mg/100g respectively. The total oxalate, phytate, alkaloid, tannin and saponin content of Syzygium jambos seed was found to be 9.87 mg/100g, 7.34 mg/100g, 5.38 mg/100g, 168.29 mg/100g, 528.55 mg/100g respectively. A comparative study of anti-nutritional factors has beenConclusion: done among 3 fruits (Jackfruit, Mango, Syzygium jambos) and their respective seeds. The results show that Syzygium jambos (fruit & seed) has less quantity of antinutritional factors than commonly consumed fruits (Jackfruit & Mango) and their seeds. So, it may be concluded that Syzygium jambos fruit and its seed may be safe to include in the daily diet. These may not lead to any adverse health effects. Moreover, S.jambos fruit and its seed may be benecial to meet daily dietary requirements for maintaining a good nutritional status for humans.