A microscope device comprising: an observation optical system capable of acquiring a reference image of a sample; at least one stimulation optical system configured to irradiate the sample with light to stimulate the sample within an adjustable stimulation region; a region specifying unit configured to specify the stimulation region to be stimulated by the at least one stimulation optical system on the reference image acquired by the observation optical system; a plurality of light-path combining units (127A, 127B, 127C, 127D) configured to combine a light path of the observation optical system with a light path of the at least one stimulation optical system; a switching unit configured to allow selective insertion or removal of the light-path combining units (127A, 127B, 127C, 127D) into or from the light paths; a storage unit configured to store the sizes of the maximum field of view of the observation optical system and the at least one simulation optical system and offset amounts between the light paths for the individual light-path combining units (127A, 127B, 127C, 127D); and a field-of-view displaying unit configured - to correct a position of an indication indicating a maximum field of view of the at least one stimulation optical system based on the offset amount for the light-path combining unit (127A, 127B, 127C, 127D) selected by switching with the switching unit and display, superimposed on the reference image, the indication indicating the maximum field of view of the at least one stimulation optical system, or - to display an indication indicating a common field of view common to two or more of the stimulation optical systems based on the offset amounts for the individual light-path combining units (127A, 127B, 127C, 127D). an observation optical system capable of acquiring a reference image of a sample; at least one stimulation optical system configured to irradiate the sample with light to stimulate the sample within an adjustable stimulation region; a region specifying unit configured to specify the stimulation region to be stimulated by the at least one stimulation optical system on the reference image acquired by the observation optical system; a plurality of light-path combining units (127A, 127B, 127C, 127D) configured to combine a light path of the observation optical system with a light path of the at least one stimulation optical system; a switching unit configured to allow selective insertion or removal of the light-path combining units (127A, 127B, 127C, 127D) into or from the light paths; a storage unit configured to store the sizes of the maximum field of view of the observation optical system and the at least one simulation optical system and offset amounts between the light paths for the individual light-path combining units (127A, 127B, 127C, 127D); and a field-of-view displaying unit configured - to correct a position of an indication indicating a maximum field of view of the at least one stimulation optical system based on the offset amount for the light-path combining unit (127A, 127B, 127C, 127D) selected by switching with the switching unit and display, superimposed on the reference image, the indication indicating the maximum field of view of the at least one stimulation optical system, or - to display an indication indicating a common field of view common to two or more of the stimulation optical systems based on the offset amounts for the individual light-path combining units (127A, 127B, 127C, 127D). - to correct a position of an indication indicating a maximum field of view of the at least one stimulation optical system based on the offset amount for the light-path combining unit (127A, 127B, 127C, 127D) selected by switching with the switching unit and display, superimposed on the reference image, the indication indicating the maximum field of view of the at least one stimulation optical system, or - to display an indication indicating a common field of view common to two or more of the stimulation optical systems based on the offset amounts for the individual light-path combining units (127A, 127B, 127C, 127D).