The identification of the cumin oil composition was determined qualitatively and quantitatively by GC, using standard compounds. The components of the cumin seed oil (Cuminaldehyde, p-cymen and β-penine) were matched with the standard compounds. The factors effect on some components of cumin seed volatile oil were studied. The effects of time and temperature on the cumin seeds components were studied, the results have been shown that the total oil and volatile oil and its main components decreases with the passing of time and with the increasing of temperature.