An image capturing apparatus includes an image capturing unit having an image capturing device; and a control unit that calculates a control value of exposure conditions on the basis of an image signal for output, the image signal for output being generated by exposing the image capturing device under the exposure conditions including an exposure time for image output for every unit time, and corrects the control value on the basis of a detection image signal, the detection image signal being generated by adding at least one of an exposure time for first detection longer than the exposure time for image output and an exposure time for second detection shorter than the exposure time for image output within a unit time.