A projection device (20) is provided with an optical element (50), a radiating device (60), an optical modulator (30), an intermediate optical system (70), and a projecting optical system (80). The projection device (20) scans over a holographic recording medium (55) with coherent light by means of a scanning device (65), causes the coherent light that was diffused by the holographic recording medium (55) to enter the intermediate optical system (70), and having suppressed the angle of divergence of the coherent light by means of the intermediate optical system (70), illuminates a region (LZ) to be illuminated. As a result, it is possible to effectively suppresse speckle noise arising when using coherent light at a light source, and it is possible to increase the illumination strength of the region (LZ) to be illuminated as it is possible to reduce the proportion of the coherent light diffused by the holographic recording medium (55) that is coherent light not used in illuminating the region (LZ) to be illuminated.