Until now it has not surely been pointed out about the relation between the biting force and the facial types in scientific view. But it´s correlation was assumed by several scientists: recently some literatures reported about the maximum biting force and facial types, but there´s only a little articles about the relation between the biting force(biting force contain maximum biting force, chewing force and swallowing force) and facial type. So this study was, firstly, performed to establish the relation of the normal face and long face versus biting force. 2ndly it was performed to establish the relation between the difference in mouth opening degrees versus biting force. 3rdly it was performed to establish the relation between male and female versus biting force. Biting force was measured from 56 adults (normal 26, long 30) whose samples was selected from Yonsei university students and Hospital patients. Sample was divided into 2groups (normal and long) by lateral cephalogram. The results of this study was obtained as follows. 1. Maximum biting force and chewing force in long face was smaller than normal face. 2. When the thickness of transducer was changed from 6mm to 9mm, maximum biting force and chewing force was larger than before. 3. In case of comparing with male and female, male was larger than female in maximum biting force and chewing force.