The subject invention provides an image searching device ensuring both accuracy and speed in image searching operation. The image searching device comprises: characteristic generation section 10 for (i) receiving scan-image-information produced by an image scanning section which scans an original image, which is formed on a recording material according to original image information, and for (ii) extracting a characteristic of the scan-image-information, which is used for specifying the scan-image-information; acquisition section 11 for acquiring candidates for original image information corresponding to the scan-image-information, according to the characteristic, from a storage section 6 which stores a plurality of image information items; comparison section 14 for comparing each of the candidates for the original image information with the scan-image-information on a pixel basis; and determination section 12 for determining the original image information corresponding to the scan-image-information, according to a result of comparison by the comparing means.