An image capturing apparatus includes an image capturing unit configured to change a charge accumulation time for each area, a histogram calculation unit configured to calculate a histogram of a pixel value for the each area, an area increase/decrease unit configured to increase or decrease the number of divisions of the area based on the histogram calculated by the histogram calculation unit, and a determination unit configured to determine a charge accumulation time of the each area of which number has been increased or decreased by the area increase/decrease unit.