The present invention relates to an image evaluating apparatus, an image evaluating method, and a non-transitory storage medium. Standard positional information is acquired about a plurality of regions of interest (116) to be quantified, which are designated in a standard image region (Rs). An image magnification which represents a size ratio of measurement image region (Rm1, Rm2) represented by the image data (Id) to the standard image region (Rs) is calculated. Positional information of a plurality of regions of interest (120, 122) depending on the measurement image region (Rm1, Rm2) is calculated based on the acquired standard positional information and the calculated image magnification.