A microscope, comprising: a sample stage mounted to be movable in an X-direction and a Y-direction; X-/Y-directionally driving means for driving the sample stage in the X-direction and the Y-direction; a revolver including a plurality of objective lenses having different magnifications; Z-directionally driving means for moving the sample stage and the revolver relatively in a Z-direction; revolver driving means for positioning any one of the plurality of objective lenses selectively at a working position opposing the sample stage; image pickup means; image projecting optical means (50, 52) for projecting an image of a sample located on the sample stage onto the image pickup means through the objective lens positioned at the working position; display means; a touch screen disposed on a display surface of the display means; and control means, wherein the control means controls an action of the X-/Y-directionally driving means, an action of the Z-directionally driving means, an action of the revolver driving means, and a display magnification in the display means, in accordance with an operator's finger gestures used on the touch screen, wherein when a finger is contacted with the touch screen, the control device stores an image signal from the image pickup means into a built-in memory, and allows a memory image based on the stored image signal to be displayed on the display surface of the display means; when the finger is moved without being released from the touch screen, the control means moves the memory image on the display surface of the display means in accordance with movement of the finger, and allows the X-/Y-directionally driving means to act, thereby moving the sample stage in the X- and/or Y-direction; during a period from contact of the finger with the touch screen until release of the finger from the touch screen, the control means detects the movement of the finger at predetermined time intervals to update the memory image based on positions of the finger; when the movement of the finger is stopped, and the finger is released from the touch screen, to terminate movement of the sample stage, then the control means renders the image displayed on the display surface of the display means a real-time image projected onto the image pickup means; and when the finger has not been released from the touch screen, the control means determines whether the sample stage has been moved over the distance corresponding to the moving distance of the finger, then if the movement of the sample stage has not been completed, the control means continuously allows the X-/Y-directionally driving means to act, thereby moving the sample stage, and if the movement of the sample stage has been completed, the control means updates the image signal stored in the built-in memory. a sample stage mounted to be movable in an X-direction and a Y-direction; X-/Y-directionally driving means for driving the sample stage in the X-direction and the Y-direction; a revolver including a plurality of objective lenses having different magnifications; Z-directionally driving means for moving the sample stage and the revolver relatively in a Z-direction; revolver driving means for positioning any one of the plurality of objective lenses selectively at a working position opposing the sample stage; image pickup means; image projecting optical means (50, 52) for projecting an image of a sample located on the sample stage onto the image pickup means through the objective lens positioned at the working position; display means; a touch screen disposed on a display surface of the display means; and control means, wherein the control means controls an action of the X-/Y-directionally driving means, an action of the Z-directionally driving means, an action of the revolver driving means, and a display magnification in the display means, in accordance with an operator's finger gestures used on the touch screen, wherein when a finger is contacted with the touch screen, the control device stores an image signal from the image pickup means into a built-in memory, and allows a memory image based on the stored image signal to be displayed on the display surface of the display means; when the finger is moved without being released from the touch screen, the control means moves the memory image on the display surface of the display means in accordance with movement of the finger, and allows the X-/Y-directionally driving means to act, thereby moving the sample stage in the X- and/or Y-direction; during a period from contact of the finger with the touch screen until release of the finger from the touch screen, the control means detects the movement of the finger at predetermined time intervals to update the memory image based on positions of the finger; when the movement of the finger is stopped, and the finger is released from the touch screen, to terminate movement of the sample stage, then the control means renders the image displayed on the display surface of the display means a real-time image projected onto the image pickup means; and when the finger has not been released from the touch screen, the control means determines whether the sample stage has been moved over the distance corresponding to the moving distance of the finger, then if the movement of the sample stage has not been completed, the control means continuously allows the X-/Y-directionally driving means to act, thereby moving the sample stage, and if the movement of the sample stage has been completed, the control means updates the image signal stored in the built-in memory.