PURPOSE: To provide a gas safety operation monitoring display device inspection device capable of automatically checking and inspecting whether gas safety operation is normally functioned or not by comparing the display contents of a warning display device for displaying safety operation by warning with the informed contents of safety operation.

CONSTITUTION: A receiving means 20c2 receives information from an informing means 13b based upon a monitored result obtained by a monitoring means 13a. A photoelectric conversion means 24 to be optionally loaded to a warning display means 16 has plural light receiving elements 241 to 243 corresponding to plural light emitting elements 161 to 163 in the means 16 and converts light received by these light receiving elements 241 to 243 into an electric signal. A storage means 20b8 stores a flashing pattern determined based upon the contents of information received by, the means 20c2, and the electric signal obtained by the means 24.