Abstract: In the present study, effect of exogenous application of salicylic acid (1.5 and 3 mM ) and malic acid (100 and 150 mg L-1) on components of essential oils of Rosmarinus officinalis was evaluated. All SA and MA treatments enhanced limonene, 1.8-cineole, α-pinene, camphene and camphor, while terpinen-4-ol, sabinene, verbenol, germacrene-D, bornyl acetate, myrcene, α-phelandrene, α-terpinolene and β-caryophyllene decreased. The study demonstrated that SA and MA can be change secondary metabolites in Rosmarinus officinalis.