Mahamayuri (Sanskrit: महामायूरी Mahāmāyūrī ("great peacock"), Chinese: 孔雀明王 Kǒngquè Míngwáng, Vietnamese: Khổng Tước Minh Vương, Japanese: 孔雀明王, romanized: Kujaku Myōō, Korean: 공작명왕 Gongjak Myeongwang), or Mahāmāyūrī Vidyārājñī is a bodhisattva and female Wisdom King in Mahayana and Vajrayana Buddhism. In the latter tradition, Mahamayuri is a popular practice in both the Chinese and Japanese forms of Vajrayana. She is also the name of one of the five protective goddesses in Buddhism.
In Chinese Buddhism and Shingon Buddhism, it is believed that the Great Peacock King is an incarnation of either Vairocana Buddha or Shakyamuni Buddha. Its main merits include the elimination of poison and disease, the protection of the country, the dispelling of disasters, and the ability to pray for both rain and cessation of rain.