Provided is a projection display apparatus that can improve the chromaticity of blue light. The projection display apparatus (100) includes a light source unit (10) including a laser diode that emits blue light, a dichroic mirror (20), a phosphor wheel (30), a phosphor plate (40), a color wheel (50), a rod integrator (60), a DMD (70) and a projection unit (80). The blue light emitted from the light source unit (10) passes through the opening (31B) of the phosphor wheel (30) and is incident on the phosphor film (33) provided on the phosphor plate (40). A part of the blue light incident on the phosphor film is absorbed, and light having a wavelength band of 471 nm to 680 nm is emitted, and the remaining part is transmitted through the fluorescent plate. The blue light that has passed through the fluorescent plate and the emitted light including the light of the wavelength band of 471 nm to 680 nm are synthesized by the dichroic mirror (20).