The wood anatomy of Fabaceae tree species was studied in four locations of tropical rainforest West Sumatera Province, Indonesia using survey method. Samples were collected from trees having minimum diameter 20 cm, and parts of stem about 120 cm above soil surface. Permanent slides were prepared using sliding microtome and stained with Safranin 2% in ethanol 70%. Description of qualitative characters of wood anatomy referred to IAWA list and category of quantitative characters referred to Atlas of Indonesian Wood. The grouping of wood anatomy was based on quantitative characters of wood anatomy using Paired Group at PAST Program. Results showed that 12 tree species of Fabaceae generally had diffuse vessels with solitary-multiple groups, except Parkia speciosa, Adenanthera malayana and Dalbergia sisso had multiple vessels. Parenchyma types varied greatly, i.e. diffuse apotracheal, scanty, vasicentric, confluent and aliform paratracheal. All species studied had homocelluler type of ray cell composition, and the composition of rays varied, i.e, uniseriate, combination of uniseriate-multiseriate, and multiseriate. The character of ray height could be used as key character to categorize wood anatomy of the Fabaceae tree species.
