To provide a method for correcting color unevenness corresponding to a projected state of a projection lens.

The color unevenness correction method includes: a step of storing a correction coefficient to correct color unevenness at a prescribed projection position within a projection range of the projection lens and a prescribed zooming position within a zoom range of the projection lens corresponding to the prescribed projection position; a step of detecting zooming position data within the zoom range of the projection lens corresponding to the projection position; a step of obtaining a color unevenness correction coefficient corresponding to the detected projection position and zooming position by interpolation calculation on the basis of a color unevenness correction coefficient at the stored prescribed projection position and prescribed zooming position, and a step of adding the correction coefficient on the basis of the color unevenness obtained by the interpolation calculation to a video signal to automatically correct the color unevenness.