1. The mean location of the occlusal plane of the dentitions of 53 dental and dental hygiene students was studied. The Schwarz mirror-photographic method was used, and the facial type was determined according to the Simon classification. The mean ala-tragus line, and the relation of it to the occlusal plane was studied for Simon's six facial types. 2. Data of this study indicate that, among the different facial types studied, the line connecting the lowest point of the ala of the nose to the inferior margin of the tragus is nearly parallel to the occlusal plane. This line is referred to as Camper's plane when used by prosthodontists. The correlation between facial types and the location of the occlusal plane, when considered from the lateral aspect, was also indicated. 3. A comparison of the results of this study with those of other investigators indicate that our results are reasonable. 4. The method used in this study is clinically applicable to complete denture construction.