A flash band determination device capable of always detecting a flash band with high accuracy, and correcting the detected flash band. It is determined whether or not there is a high-luminance area in an image, which is an area having a luminance level exceeding a predetermined luminance level. When determining whether or not a flash band which is an area having a luminance level higher than a predetermined threshold level is present in a difference image which is a difference between two images which are continuously obtained, if it is determined that the high-luminance area is present, whether or not the flash band is present is determined, by excluding an area corresponding to the high-luminance area, as a determination excluded area, from the difference image.