Abstract Pistacia atlantica Desf. is widely distributed in South Algeria. It is a medicinal and foodstuff plant. Decoctions of leaves and fruits are used against stomach ache and caught. Ripe fruits are components of tonic sweets. Essential oils from leaves, fruits and galls of P. atlantica, analyzed by GC/FID, GC/MS and 13C-NMR, were dominated by monoter-pene hydrocarbons, Î±-pinene (32.6â54.7%) and Î²-pinene (8.0â20.2%) being the major components. Sesquiterpenes accounted for 14.1â21.7% in leaf oils, 3.6% in fruit oil and 4.8% in gall oil.