To enable the checking for whether a fire extinguisher is housed or not simply and easily.

For this tunnel fire extinguisher apparatus 10, the fire extinguisher is housed in a fire extinguisher storage portion 36 equipped with a freely openable/closable fire extinguisher door 28, and a hose having a nozzle is housed in a cabinet 12. Upon fire extinguishment, the hose having the nozzle is pulled out by opening a hydrant door 16 of the cabinet, and fire extinguishment is performed. On the fire extinguisher door 28, a translucent plate 30 through which the inside can visually be recognized is installed. At an invisible position behind the fire extinguisher, a reflecting member 34 which reflects light entering from the outside through the translucent plate 30 is arranged. When the reflected light by the reflecting member 34 is seen by the projection of light, the absence of the fire extinguisher can be determined.