The chemical composition of the essential oils hydrodistillated from leaves, stems and bunds of Mentha retendifolia, collected from Constantine (sub humid area) Algeria, was analyzed by (GC-MS). In total, 21, 13 and 21 chemical compounds were identified in the essential oils; respectively. The essential oils represented 63.2%, 22.8%, and 34.1%, of the total oil composition in leaves, stems, and buds correspondingly. The results showed that the major components from the leaves were: Germacrene (26.47 %), Caryophyllene (13.56%), Hydroquinone, 2,6-dimethyl (11.51%), β-Farnesene (8.52 %). Whereas in stems, the major components were pulegone oxide (83.51%), Spatlehunol (3.0 %), Borneol (2.19 %), and Aglaiene (1.76 %), and in bunds, the major components were Puligone (57.97) Caryophyllene (6.01 %) Germacrene (5.28 %) and δ-Cadinene (5.13 %).
