The subject innovation is not the contact exposed to sparks during switching do not cause a contact damage relates to non-contact type limit switch that is to be used semi-permanently. According to the present invention, in the limit switch provided with a movable rod that is vertically movable inside the switch body, depending on the knob moves by an external force, the lower end of the movable rod coupled to the permanent magnet, and the switch body inside of the bottom if there at the same time to place a fixed reed switch which is switched by a magnetic force and forming a limited projection which is in contact with the permanent magnets, the non-contact type limit switch according to that characteristic hayeoseo connected to both ends of the reed switch in the two external terminals is provided .