Buchanania sessilifolia is a tree in the family Anacardiaceae. The specific epithet ' is from the Latin meaning 'leaf without stalk', referring to the sessile leaves.
Buchanania sessilifolia grows as a tree up to tall with a trunk diameter of up to . Its smooth bark is grey-brown. The flowers are whitish. The fruits measure up to long.
Buchanania sessilifolia grows naturally in Laos, Thailand, Sumatra, Peninsular Malaysia and Borneo. Its habitat is lowland forests from sea-level to altitude.