The purpose of this study was to determine whether head posture affects three-dimensional (3D) facial images. This study evaluated facial images of 10 mannequins, which are taken from standard postures, left and right rotations, and up and down rotations. The images with changed head posture were superimposed onto standard head posture image, and the difference between the two images was used to evaluate deformations in images with the changed head postures. The 3D facial images showed considerable differences depending on different head positions.