An image capturing apparatus, comprising: an image sensor configured to capture an image of a subject and output image signals, a dividing unit configured to vertically divide the image signals into a plurality of regions, a detection unit configured to detect flicker based on a signal level of each of the plurality of regions, and a control unit configured to cause a plurality of image captures with different exposure conditions to be performed using the image sensor, wherein the detection unit, by adjusting a phase of a flicker appearing in each of the plurality of image signals obtained by the plurality of image captures, detects a flicker from the plurality of image signals.