Justicia pectoralis Jacq. (Creeping and raising, the two varieties that grows in Cuba) is a plant commonly known as “tilo” in America and Caribbean. The plant is used in a same way than European Tilia species. The variability in the chemical composition of the volatile components derived from this plant gathered in different growing months is reported herein for the first time. The aerial parts, those parts exposed to the air, of Justicia pectoralis Jacq. produce only traces quantities of essential oil directly by distillation and was necessary to distil with solvent assistance to obtain volatile components in the four month period of the evaluation. Using GC-MS analysis, 23 components were detected and identified in the volatiles of the two varieties, Coumarin at 28 to 39,86%, Trans-2-hexenal, at 1, 109 to 14,93%, and 2-hexanol at 5,68 to 14,93% were the most important components identified.