An image verification system including a fingerprint sensing means for sensing a fingerprint; an image data storing means for storing image data of the fingerprint sensed by the fingerprint sensing means as first image data; and a residual fingerprint judging means for comparing second image data of a fingerprint newly sensed by the fingerprint sensing means with the first image data stored by the image data storing means, and judging whether or not the second image data indicates a residual fingerprint, wherein the residual fingerprint judging means judges that the second image data indicates a residual fingerprint and does not verify the fingerprint when said first image data and the second image data match, while judges that the second image data is not a residual fingerprint and verifies the fingerprint when the first image data and the second image data do not match, whereby a fingerprint can be verified with a high precision without erroneously detecting a residual fingerprint.