A proposition of the present invention is to provide a laser scanning microscope capable of enhancing the degree of freedom of observation while keeping its structure simple. Accordingly, a laser scanning microscope (100) of the present invention includes a light source part (1), a spectroscopic unit (9) guiding light from the light source part (1) to a specimen plane (16) and guiding the light from the specimen plane (16) to a detector, light path switching units (10 and 13) switching a light path between the spectroscopic unit (9) and the specimen plane (16) to one among a plurality of light paths (R1 and R2) with different routes, and a plurality of light deflecting units (11 and 12) each disposed in each of the plurality of light paths.