Sindora siamensis is a species of leguminous tree in the subfamily Detarioideae. Like several other species in the genus Sindora, its wood is considered valuable; the least concern conservation status may reflect efforts to replant this species, but mortality rates are high. S. siamensis var. maritima (Pierre) K.Larsen & S.S.Larsen is an accepted name. S. siamensis is a large evergreen tree found in semi-deciduous, seasonal tropical forests in Cambodia, Laos, Malaysia, Thailand, and Vietnam. Large specimen trees and examples of replanting can be found in Cát Tiên National Park; its Vietnamese name is gụ mật.