Abstract: The temporomandibular joints of 43 Bronze-lron Age human skulls unearthed in Hebei, Shanxi and Inner Mongolia are studied in this paper. According to their economic types, these skulls can be divided into two groups: the ancient agricultural nation group and the ancient nomadic nation group. The result of this research shows the difference about human dietary traditions decided by their economic types in the primary factor that leads to the morphological and structural changes of human temporomandibular joint.

Key words: Bronze Age; Iron Age; Human; Temporomandibular joint