An image pickup apparatus having an image pickup device structured by a plurality of pixels having different photoelectric conversion characteristics different from each other on each side of an inflection point, correcting an error of the photoelectric conversion characteristics, thereby contributing to realization of high image quality will be provided. In the image pickup apparatus having an image pickup device structured by a plurality of pixels having different photoelectric conversion characteristics different from each other on each side of the inflection point, on the basis of the inflection point of the standard photoelectric conversion characteristic and correction data, whether or not to execute a correction using the correction data to the imaged data of the pixels and whether or not to execute characteristic transformation using the characteristic transformation section to the imaged data of the pixels are decided.