Chisocheton crustularii is a tree in the Meliaceae family. It grows up to 8 metres (30 ft) tall with a trunk diameter of up to 8 centimetres (3 in). The bark is greyish. The flowers are white. The specific epithet crustularii is from the Latin meaning "pastry maker", referring to the tart-shaped flower disc. Habitat is rain forest. C. crustularii is endemic to Borneo and known only from Sarawak.