An image capturing apparatus comprises a focus detection unit configured to detect, based on a signal output from an image sensor, a focus evaluation value using one of a plurality of different focus detection methods, a correction unit configured to correct the focus evaluation value in accordance with the focus detection method used for the detection, and a storage unit configured to store information for calculating a reference correction value for correcting a focus evaluation value detected using a predetermined one of the focus detection methods, and information for calculating, from the reference correction value, a correction value for correcting a focus evaluation value detected using another of the focus detection methods. The correction unit calculates a correction value using the information stored in the storage unit, and corrects the focus evaluation value using the calculated correction value.