This article provides a brief introduction to the core content of Solitary-realizer Bodhi. What is Solitary-realizer Bodhi? It is the Solitary-realizer Vehicle, one of the three vehicles in the Three-vehicle Bodhi, which includes the Buddha Bodhi of the Mahayana, the Sound-hearer Vehicle and Solitary-realized of the Hinayana. It is also called the Solitary Buddha (Pratyekabuddhas) Vehicle or the Middle Vehicle.