Abstract: This paper worked on the hypothesis suggested by some schoolars that finger prints might be used to identify paternity or/and maternity.200 people's two-hand finger prints of parents and children in blood relations of 62 families were investigated.The data was analysed statistically by Falconer method.According to the data analysed,three hypotheses had been surposed and each hypothesis had been fully discussed.The conclusion is that it is impossible that the finger prints can be used as an indicator of blood relatonship.