(2) describe differences in lip prints among the opposite sexes of the Cham group. Research methods and subjects: 300 Cham people aged from 5 to 82 in La Ma, Vinh Truong Commune, An Giang Province are taken photograph by a digital camera. Results: After the investigation of the formation of lip print of 300 Cham people, 8 types of lip prints and 8 forms of lip print edge area were classified.