A confocal microscope comprises a light source unit having at least two light sources which generate lights having different wavelengths, an objective lens which condenses light from the light source unit on a sample, a light scanning unit which scans the light form the light source unit on the sample two-dimensionally, and a photonic crystal fiber which is disposed between the light source unit and the light scanning unit, and which propagates the light led from the light source unit to the light scanning unit side, wherein the photonic crystal fiber has a plurality of air holes arranged at a clad provided at a periphery of a core.