1. An image processing apparatus for processing an image including an image of a face, comprising: normalizing means for normalizing the image including the image of a face so that the size of the face becomes a predetermined face size; detection area setting means for setting an area smaller than the image normalized by the normalizing means as a detection area in which a position of a face part of the face is detected; and detecting means for detecting the position of the face part in the detection area set by the detection area setting means.