A medical apparatus (1, 1A, 1B), comprising: an illuminator configured to irradiate a living tissue with a light for normal-light observation and a light for special-light observation; an imager (17, 18) configured to pick up an image of a return light from the living tissue irradiated with the light from the illuminator; and an image processor configured to generate a normal-light observation image obtained by picking up an image of a return light from the living tissue irradiated with the light for normal-light observation in a first observation field of view in the imager (17, 18), and further a special-light observation image obtained by picking up an image of a return light from the living tissue irradiated with the light for special-light observation in a second observation field of view in the imager (17, 18); characterized by further comprising: a discriminator configured to determine matching of the first observation field of view and the second observation field of view; a marker generator (36, 37) configured to generate the same or slightly changed markers to be displayed for indicating the same position for the normal-light observation image and the special-light observation image when it is determined that the first observation field of view and the second observation field of view match each other in the discriminator; and a display (5, 5a) configured to simultaneously display the normal-light observation image and the special-light observation image on which the markers generated by the marker generator (36, 37) are respectively superimposed. an illuminator configured to irradiate a living tissue with a light for normal-light observation and a light for special-light observation; an imager (17, 18) configured to pick up an image of a return light from the living tissue irradiated with the light from the illuminator; and an image processor configured to generate a normal-light observation image obtained by picking up an image of a return light from the living tissue irradiated with the light for normal-light observation in a first observation field of view in the imager (17, 18), and further a special-light observation image obtained by picking up an image of a return light from the living tissue irradiated with the light for special-light observation in a second observation field of view in the imager (17, 18); characterized by further comprising: a discriminator configured to determine matching of the first observation field of view and the second observation field of view; a marker generator (36, 37) configured to generate the same or slightly changed markers to be displayed for indicating the same position for the normal-light observation image and the special-light observation image when it is determined that the first observation field of view and the second observation field of view match each other in the discriminator; and a display (5, 5a) configured to simultaneously display the normal-light observation image and the special-light observation image on which the markers generated by the marker generator (36, 37) are respectively superimposed. a discriminator configured to determine matching of the first observation field of view and the second observation field of view; a marker generator (36, 37) configured to generate the same or slightly changed markers to be displayed for indicating the same position for the normal-light observation image and the special-light observation image when it is determined that the first observation field of view and the second observation field of view match each other in the discriminator; and a display (5, 5a) configured to simultaneously display the normal-light observation image and the special-light observation image on which the markers generated by the marker generator (36, 37) are respectively superimposed.