Probiotic feeding leads to the development of stable type of micro flora which helps the bird to resist infections noticeably in the intestinal tract and helps in several ways. With this objective present study was under taken to evaluate the effect of probiotic on performance of commercial broiler chicks. In study two groups one without probiotic (P0) and another with Probiotic (P) supplementation were considered for the study. The experiment consisted of two replicates for probiotic groups. The performance of broiler was evaluated in terms of growth, feed efficiency and percent mortality at 6th week of age