The human skull is a complicated structure made up from 20 constituent bones and it is thus not suprising that the pattern of growth is complicated. The fully grown skull is not simply a larger version of the inflant form. The adult skull differs not only in size but also in shape, indicating that there must be a process of differential growth. The differential growth process must be a differential activity seen in the craniofacial skelet, during the growing period and it may be divided into four component. Knowledge of craniofacial growth provides a background to the understanding of the treatment planning process and to undertake suitable interceptive treatment to hinder the stomatognathic function problems in the future.