To provide a light emission type contact switch capable of having difficulty being influenced by outside primary factors and increasing certainty of the action of a device to be connected.

The light emission type contact switch comprises a light emission section outputting a light signal containing a specific code and a light receiving section outputting a signal based on a verifiable result by verifying the code contained in the light signal outputted from the light emission section, these light emission section and light receiving section come into contact with each other to start operation, the light emission section outputs the light signal containing the specific code and, at the same time, the light receiving section verifies the code contained in the light signal outputted from the light emission section to output a signal based on the verifiable result.