PURPOSE: To reduce the number of turned off guide display lamps to the absolute minimum even when mains are damaged by fire and accidents, etc., and to prevent the secondary disaster such as fire and explosion, etc., caused directly from the damage of the mains by using a long fiber cable with light source sections provided on both ends, respectively.

CONSTITUTION: A light source sections 1 are arranged on both ends of an optical fiber cable 2, respectively. The light itself is transmitted in the cable 2 to light each guide display lamp 4 through plural spectroscope units 3 inserted at proper intervals in the cable 2, respectively. Even if the cable 2 is disconnected on the way, the light 4 near the disconnection point receives light from the section 1 on both ends to perform a function as a guide display light in succession. Thus, since the light emitting source does not become an ignition source even in an inflammable gas by sending the light itself, the safe refuge guide for a crew and passengers can continuously and surely be performed.