To provide a microscopic imaging device capable of easily switching the imaging method. During sectioning observation and normal observation, a measuring object is irradiated with pattern measurement light and uniform measurement light generated by a light modulation element, respectively. The measuring object is irradiated with the pattern measurement light and the uniform measurement light through a common light path. During the sectioning observation, a spatial phase of the pattern is sequentially moved on the measuring object by a predetermined amount by the light modulation element, and sectioning image data indicating an image of the measuring object is generated based on a plurality of pieces of image data generated at a plurality of phases of the pattern based on the light receiving signal. During the normal observation, normal image data indicating an image of the measuring object is generated based on the light receiving signal.