IThe collection of allometric data, in particular, the study of the timing of the development of the dental system in chimpanzees, gives an idea of the rate and nature of the growth of wild animals and is of great importance for understanding postnatal ontogenesis in great primates in general. Eight chimpanzee infants were observed from birth to one year. Apes were born in the Rostov-on-Don Zoo, four of them (three females and a male) grew up with their mothers, four ones (two females and two males) were in artificial feeding. The age of tooth eruption was fixed and the chimpanzees were weighed monthly. As a result of the study, the age of deciduous teeth eruption was determined. Also it was found that a formation of primary dentition begins on average in 88 day old (lim 75-120 days) and ends in 323 day old (lim 240-360 days). The sequence of deciduous teeth eruption i1-i1-i2-i2-m1-m1-m2-m2-c1-c1 was also established in chimpanzees. Also the ratio between the animal weight, age and teeth eruption time was showed. We found out that artificial feeding insignificantly delayed the primary dentition formation, although these infants increase weight faster than the chimpanzees growing up with their mother