It is an object of the present invention to provide a microscope that is capable of precisely controlling the amount of an immersion medium held in a gap between an objective lens and a mounting part, and that is capable of observing a specimen without varying the mounting part. The microscope includes a supply port from which an immersion medium is supplied to a gap between a film-like mounting part on which a specimen is loaded and an immersion objective lens, and a suction port that is arranged so as to be able to be brought into contact with an immersion medium supplied from the supply port, and from which the immersion medium can be sucked.