Akhoury Purnendu Bhusan Sinha (23 September 1928 – 4 July 2021) was an Indian solid state chemist who was the head of the Physical Chemistry Division of the National Chemical Laboratory, Pune. He is known for his theories on semiconductors and his studies on synthesis of manganites. He was an elected fellow of the Indian National Science Academy and the Indian Academy of Sciences. The Council of Scientific and Industrial Research, the apex agency of the Government of India for scientific research, awarded Sinha the Shanti Swarup Bhatnagar Prize for Science and Technology, one of the highest Indian science awards, in 1972, for his contributions to chemical sciences.