PURPOSE: To provide a microscopic device where an optimum correction filter is inserted/removed in accordance with a selected photographing optical path by easy operation, by which the best photographed image is obtained even when the photographing optical path is switched and whose operability is improved.

CONSTITUTION: This microscopic device is a microscope to which plural cameras are attached, and is constituted of a beam splitter 601 selecting the optional camera from the attached cameras 27, 27' and 602, a photodetector 21 detecting the focus of the optical path of the camera, a CPU previously preparing data in order to set the combination of the insertion/removal of the plural correction filters required at the time of photographing in accordance with the photographing optical path, a filter unit 3 for transmission set by selecting the correction filter based on the control of the CPU and a photographing control part 29 controlling photographing.