1. An image sensing apparatus comprising: an image sensing unit configured to sense an object and generate image data; a face detection unit configured to detect a face region of a person contained in the image data generated by said image sensing unit; and a facial expression determination unit configured to determine a plurality of facial expressions in the face region detected by said face detection unit, wherein when both a first facial expression and a second facial expression are determined, said facial expression determination unit corrects a condition to determine the second facial expression so as to become difficult as compared to the determination condition when the first facial expression is not determined and the second facial expression is determined.