Provided is a probe observing device, including: a camera ( 230 ) for taking an image of a probe ( 210 ); an image processing unit ( 330 ) for processing data on the image taken by the camera ( 230 ); a monitor ( 400 ) for displaying the image data processed by the image processing unit ( 330 ); and a mouse ( 500 ) for inputting an instruction for image processing through manual operation. The image processing unit ( 330 ) includes an image data processing unit ( 350 ) for processing the image data in accordance with the instruction inputted by the mouse. The camera ( 230 ) includes a low-magnification lens system, and is provided to be fixed in position with respect to the probe ( 210 ) such that the probe ( 210 ) enters the view field of the camera ( 230 ).