Abstract: Cassia obtusifolia L. leaves, a top ranking leafy vegetable of the arid Africa zone were analysed for proximate (moisture, ash, lipid, crude protein, crude fibres, total carbohydrates, total phenolic compounds) and mineral (calcium, magnesium, iron, phosphorus, zinc and manganese) composition. The leaves collected in the North of Cameroon, were dried (sun drying and oven drying), finely ground and analysed. The results of this study showed that C. obtusifolia leaves had significant amount of crude protein and total carbohydrate. The mineral analyses revealed high amount of Calcium, Phosphorus and Magnesium. Exempt the moisture and total phenol contents, the drying method (sun and oven drying) did not affect significantly (p>0.05) the proximate and mineral composition of C. obtusifolia leaves.