An imaging apparatus includes: an image sensor having a plurality of pixels arranged in an array that captures an image of a subject and outputs pixel signals; a calculation unit that calculates a correction value for correcting an error of the pixel signals read out from the image sensor for each column of the array of the pixels; and a correction unit that corrects the image signals using the correction value calculated by the calculation unit. In a live view mode, the calculation unit calculates a new correction value by averaging the calculated correction value and a correction value for a previous frame.