1. An image pick-up apparatus which include an image pick-up device having a plurality of pixels that are different in sensitivity, comprising: white balance control value calculating means for calculating control values for white balance adjustment of each of said plurality of pixels based on image signals-from said image pick-up device acquired by imaging an object; and white balance adjusting means for performing white balance adjustment of each of image signals acquired from the plurality of pixels of said image pick-up device with using said control values.