Dharmakirti is considered to be one of the significant writer on Buddhist logicians, His famous work Nyayabindu is an epoch making and typical work on the Buddhist logic. Already a large number of works on Nyayabindu have come forth and even now studies on this small treatise is going on implying the importance of this small treatise. The present work also is an attempt to study Dharmakirti's Nyayabindu and its contribution to Buddhist logical system. The work is divided into six chapters, the first chapter deals with the development of Buddhism as a philosophy in the country. The second chapter discusses the origin and development of the Buddhist logical thinking and its sources. The third chapter is an account of the life and works of the renowned logician Dharmakirti, author of Nyayabindu. The fourth and fifth chapters are a critical analysis of the work. The concluding chapter summarizes the contribution of Dharmakirti to Indian logical system, especially to the development of Buddhist logic.