A projection image display device includes: an optical element that separates incident light into a first color light beam and a second color light beam, synthesizes the first color light beam and the second color light beam to generate synthetic light, and emits the synthetic light; a first display panel that reflects and modulates the first color light beam; a second display panel that reflects and modulates the second color light beam; a first heat dissipator that dissipates heat of the first display panel; a second heat dissipator that dissipates heat of the second display panel; a light shielding portion that blocks a part of the second color light beam reflected by the second display panel from traveling toward the first display panel; a light shield heat dissipator that dissipates heat of the light shielding portion; and a container. The second heat dissipator is disposed outside the container.