Lophopetalum rigidum is a plant in the family Celastraceae. The specific epithet rigidum means 'stiff', referring to the leaves.
Lophopetalum rigidum grows as a shrub or tree, rarely up to 30m (100feet) tall, with a trunk diameter of up to . The smooth bark is brown grey, with . The leathery leaves are oblong to ovate and measure up to long. The green-yellow flowers are in . The fruits measure up to long.
Lophopetalum rigidum is endemic to Borneo, where it is known from Sarawak and Sabah. Its habitat is in swamp forests, including kerangas, and in montane forest to elevations of .