Ananas comosus (L.) Merr. (family Bromeliaceae), commonly named Pineapple, is a herbaceous perennial plant. Plant is known for its folk medicinal utility, besides agricultural utilities such as the fruit for nutritional food. Five fractions of leaves were investigated for their phytochemicals and their antioxidant activity. The extraction ability of different solvents for recovering extractable components vary. Highest yield was for distilled water. Phyto-screening of leaves for secondary metabolites revealed the presence of coumarin, terpenoides, phlobatannin, alkaloids, phenols, saponin, quinone ,cardiacglycoside, steriods and flavanoids. Antioxidant activity was determined using 2, 2-diphenyl-1-picryl hydrazine (DPPH) free radical scavenging .The extracts of different fractions exhibited different levels of antioxidant activity. Petroleum ether extract of A. comosus recorded the highest DPPH free radical scavenging activity (98.8 % ) with IC 50 value 37.7±0.18 at 250µg/ml concentration. The findings of this study indicate that this plant is medicinal with prominent antioxidant property.