Heterocyclic compounds play a crucial role in various industries such as pharmaceuticals, agrochemicals, and dyes. In recent years, photocatalytic technology has gained popularity among synthetic chemists due to its environmentally friendly and sustainable characteristics. At the same time, numerous studies have focused on the photochemical transformation of 2H-azirines, leading to the synthesis of diverse heterocyclic compounds. Therefore, this book chapter aims to provide a summary of heterocycle synthesis through the photochemical transformation of 2H-azirines published so far.