Abstract: The mass distribution in the spontaneous fission of ~(252)Cf was investigated bythe radiochemical determination of the absolute fission yield for 35 mass chains.An integration of the mass--yied curve gives a value of 199.4% which is in verygood agreement with the value of 200% in fission. The mean masses of the lightand heavy groups are located at 106.39 and 141.82 respectively. The averageneutron number per fission (?) is 3.79±0.12. The peak--to valley ratio is ≥370.The results obtained in this work is compared with those in literature.