Several unit operations such as drying, grinding, squeezing and filtrating were used to obtain tomato seed oil from tomato seeds. Tomato seed oil was extracted with supercritical carbon dioxide in a semibatch-flow extraction apparatus. The effect of milling of seeds and solvent flow rate on the extraction behaviour was stud- ied. The extraction rate increased as solvent flow rate increased (Roy, Goto, & Hirose, 2003; Roy, Goto, Hirose, Navaro, & Hortacsu, 1994). Supercritical fluid extraction is generally carried out by mechanically stirring or in a rocking batch reactor at the critical temperature and pressure of the solvent. The yield of soluble material increases with increasing pressure (Paul & Wise, 1971).