This paper describes the constituents and the physical and chemical properties of rubber seed oil produced in Nigeria. The analysis conducted indicated that the rubber seed has 22.6;lipid, 62.81;carbohydrates, 12.25;proteins, 2.35;ash and 3.10;water contents. It has a melting point of 2.6-2.7degree C. Properties such as saponification value, iodine value, hydrocyanic level, acid value, free fatty acid content, unsaponifiable matter, peroxide value, etc were also estimated. Chromatographic estimation of lipid in rubber seed oil indicated that it contained 8.3;stearic acid, 21.0;oleic acid, 38.2;linoleic acid, 24.3;linolenic acid, 7.0;palmitic acid and 0.3;unidentified material. From these properties, it is evident that the rubber seed oil could be used in application such as paints, soaps, cold creams and surface coatings.