PURPOSE: To provide a detecting switch device by which labor is not taken in work at a job site by arranging plural detecting switches together in an apparatus body so as to open and close a circuit by independently detecting the position of a moving object.

CONSTITUTION: Stand parts 1a are respectively and protrusively arranged in both end parts of an apparatus body 1. A first detecting switch 2 is arranged in the stand part 1a of one end part, and a second detecting switch 3 is arranged in the stand part 1a of the other end part. When a moving object 10 moves in the arrow direction, the first detecting switch 2 detects the position of the moving object 10, and opens and closes a transistor 2a so that a load 20a operates. Afterwards, when the moving object 10 goes over a moving terminal and continues to move, the second detecting switch 3 detects the overrun, and a contact point part 3a opens and closes so that a load 20b to stop the movement of the moving object 10 operates. In the plural detecting switches 2 and 3, wiring is laid between them. In the plural detecting switches, the distance between respective ones can be freely adjusted.