GUIDING DEVICE

PROBLEM TO BE SOLVED: To provide a guiding device facilitating mounting of a mounting body onto a mounted body.SOLUTION: The guiding device includes a first guide part formed on the mounting body, and a second guide part formed on the mounted body onto which the mounting body is mounted. One of the first and second guide parts has a rail-defining recessed part. The other of the first and second guide parts has a protruded part fitting into the recessed part. The protruded part has a first V-shaped corner part tapered toward the recessed part. The recessed part has a second V-shaped corner part expanding toward the protruded part. The first and second corner parts mutually fit so that the first and second guide parts are slidable.