The essential oil obtained from the leaves of Anacardium humile (Anacardiaceae) were analyzed by GC and GC/MS. Thirty-five compounds were identified in the leaf oil. The major constituents in the leaf oil were α-bulnesene (8.6%), γ-cadinene (7.5%), selinα-3,7(11)-diene (6.7%), α-himachalene (6.1%) and cyperene (5.0%).