An image display device includes an image display element that displays images, a light blocking member that includes a light blocking portion blocking light from reaching a peripheral portion of the image display element, and a dust-proof member that is provided to surround the outer peripheries of the image display element and the light blocking portion such that the image display element and the light blocking portion positioned inside the dust-proof member have a dust-proof structure, wherein the light blocking member includes a heat dissipation portion which is integrally formed with the light blocking portion and which releases heat from the light blocking portion to the outside of the dust-proof member.