In an image provision apparatus (100), a decomposition unit (111) decomposes image data into pieces of unit image data (70). A storing unit (112) stores, in a memory unit (130), image management information (131) including each piece of unit image data (70) of the pieces of unit image data and position information. An acquisition unit (121) accepts a provision request (52). The provision request (52) includes range information representing a range of a partial image in the image. The acquisition unit (121) acquires a unit image data set (711) representing unit images each including at least part of the partial image from the image management information (131), based on the range information and the position information. A generation unit (122) generates the partial image (63) based on the unit image data set (711).