The Malaysian Kapok (Ceiba pentadra) seeds were found to contain about 28 per cent oil. The oi from both raw and roasted seeds produced a positive Halphen test for cyclopropenoid fatty acids. Acid value fatty acid composition by gas-liquid chromatography, iodine value, refractive index, saponification number and unsaponifiables of the oil were also determined. The values (area percent) for fatty acids as methyl ester were: C14:0 (0.25%), C16:0 (24.31%), C16:1 (0.4%), C18:0 (2.65%), C18:1 (21.88%), Cl 8:1 (38.92%), C20:0 plus C l8:3 (1%)> malvalic acid (7.18%), C22:0 (0.44%), and sterculic acid (2.96%) Malvalic and sterculic acids were determined as AgNO3-CII3OH derivatives of their methyl esters. Since the cyclopropenoid fatty acids bring about a number of abnormal physiological effects in experimental animals, it would be extremely unwise to consume these seeds.