A light emission control device that is capable of controlling an emission amount of a light emitting unit irrespective of existence of a high-intensity light source. A selecting unit divides each of a non-emission image and a pre-emission image into a predetermined number of block areas, and selects a light-control target area according to a difference between luminance values in the non-emission image and the pre-emission image. A first weighting unit generates first weighting data by allocating a predetermined weight to each the light-control target area. A second weighting unit finds a weighting coefficient for each the light-control target area in the non-emission image, and to generate second weighting data by multiplying the first weighting data by the weighting coefficient. A control unit controls the emission unit according to a main emission amount that makes the light-control target area be proper exposure with reference to the second weighting data.