Abstract: An image search apparatus includes: an image feature extraction unit for extracting features of images; an image search data storage unit for storing the features of the images; a user interface unit for inputting an image search condition, and displaying a search result; and an image search execution unit for executing an image search, by using the features of the images based on the image search condition, wherein the user interface unit allows multiple key images to be inputted as the single search condition, the image search execution unit executes the search by using key images included in the single search condition, and the user interface unit displays the search result in the order of similarities to the key images.