PROBLEM TO BE SOLVED: To provide a face feature extraction device facilitating work for having an administrator confirm and correct feature points extracted from a face image and a face authentication system using the feature points information extracted by the face feature extraction device.SOLUTION: A feature extraction means 12 of an administrator terminal 1 extracts a plurality of feature points corresponding to respective parts of a face from a face image in which the face of a user is photographed. A generation means 13 generates teaching information indicating the positions of representative feature points corresponding to representative parts which are the feature points extracted from the face image and predetermined among the respective parts of the face. A display control means 14 displays the teaching information superposed on the face image on a display unit 40. In addition, a re-extraction means 16 re-extracts the feature points corresponding to at least that part from the face image based on the part of the face or a correction position in the face image corresponding to the part of the face indicated through an operation unit 50.
