A biological trial was conducted to investigate the effect of feeding garlic (Allium sativum) powder as prebiotic on the performance of broiler chicken. A total of 144 numbers of day old broiler chicks with uniform body weight were randomly divided into four groups viz, T 0 (Standard basal diet as control), T 1 (basal diet + 0.5 percent garlic powder), T 2 (basal diet + 1.0 percent garlic powder) and T 3 (basal diet + 1.5 percent garlic powder) comprising 36 chicks in each group. The final body weight was significantly (P≤0.05) higher in T 2 group (2175.00g) followed by T 3 (2008.3g), T 1 (1986.11g) and T 0 (1904.86g). In respect of overall FCR, the T2 group showed the best FCR value of 1.67 followed by T 3 (1.74), T 0 (1.78) and T 1 (1.80). The study revealed that there was increased body weight, improved FCR, highest BPEI and cent percent livability and higher gross profit per bird offered with 1.0 percent garlic powder in feed.