Tomato (Solanum lycopersicum [Lin.] Con., Solanaceae) is important for global food security. Although leaves, ripe and unripe fruits are consumed, the ripe fruits are most preferred. Four Tomato accessions were collected from traditional agriculture system in Edo State, Southern Nigeria and cultivated. Standard methods were employed to analyze the leaves, ripe and unripe fruits of the Tomato accessions for phytochemical and proximate constituents. The results suggest that the Tomato accessions had high moisture in ripe fruit of accession A4 (76.62 %), high carbohydrate in the leaf of accession A3 (18.55 %) and high protein contents in leaf of accession A2 (8.37 %). The samples were also found to have large amounts of phytochemicals such as β-carotene in ripe fruit of accession A4 (1720 µ/g), glycoside in the leaf of accession A4 (23.76 mg/g), flavonoid in the leaf of accession A2 (7.66 mg/g) and vitamin C in ripe fruit of accession A4 (1.78 mg/g). This study has further emphasized that Tomato is critical to world food security as the proximate chemical and secondary biochemical composition are vital to enhancing human and animal health

Keywords: Tomato, Phytochemical constituents, Food security