A color conversion panel includes: a substrate; a plurality of color filters on the substrate; a partition wall on the substrate, and including a first opening, a second opening, a third opening, and a sub-opening; a first color conversion layer disposed in the first opening of the partition wall; a second color conversion layer disposed in the second opening of the partition wall; a transmission layer disposed in the third opening of the partition wall; an additional layer disposed in the sub-opening of the partition wall; and a spacer on the additional layer.