The injection of the infraorbital nerve in the infraorbital canal, gives a full anesthesia to the anterior superior nerve, for a major operations in the anterior part of the upper jaw or in case which an infection precludes a local injection. In this study we describe in detail the position of the infraorbital foramen in 55 crania and in 16 cadavers. As landmarks in the cadavers, we used the lateral point of the wing of the nose, and the medial angulus oculi. As landmarks in the crania we used, the inferior orbital rim, the zygomaticoalveolar crest and the anterior nasal spine. The results of our measurements are the following: 1. The infraorbital foramen is situated in equal distance from the medial angulus oculi and the zygomaticoalbeolar crest. 2. The infraorbital foramen, the anterior nasal spine and the zygomaticoalveolar crest form the vertex of an isosceles triangle. The infraorbital foramen is situated in the vertex which corresponds to the one of the equal angles. 3. The infraorbital foramen is situated 7.19 mm below the infraorbital.