Tenjō Sajiki, also Tenjou Sajiki (天井桟敷, Tenjō Sajiki), was a Japanese independent theater troupe co-founded by Shūji Terayama and whose members include Kohei Ando, Kujō Kyōko, Yutaka Higashi, Tadanori Yokoo, and Fumiko Takagi.

It was led by Shūji Terayama and active between 1967 and 1983 (until Terayama's death). A major phenomenon on the Japanese Angura ("underground") theater scene, the group has produced a number of stage works marked by experimentalism, folklore influences, social provocation, grotesque eroticism and the flamboyant fantasy characteristic of Terayama's oeuvre. Tenjō Sajiki benefitted greatly from collaborations with a number of prominent artists, including musicians J. A. Seazer and Kan Mikami, and graphic designers Aquirax Uno and Tadanori Yokoo.

The name is from 天井桟敷の人々, the Japanese title of the film Children of Paradise.