An image pickup apparatus capable of performing an appropriate correction processing that suppresses an influence of high luminance light is provided. The image pickup apparatus comprising at least one processor and/or circuit configured to function as inferring a luminance of a high luminance subject having a pixel signal saturation level or higher based on image signals generated from a plurality of pixels, and determining an area for obtaining a correction value used when correcting the image signals based on the inferred luminance of the high luminance subject.