PURPOSE: To provide a fire robot capable of performing fire-extinguishing action in an optimum position and having an aid liquid feeding function by which a stored liquid tank and a battery can be made smaller in size and lighter in weight by reducing the number of liquid feeding joints along a long path of movement, such as a tunnel.

CONSTITUTION: This fire robot 2 movable along the path 1 of movement has a fire-extinguishing liquid storage tank 12 and a liquid feeding joint 16 that can be combined with the liquid receiving joint 19 of another fire robot. A liquid receiving joint 8 provided in the fire robot 2 can be connected to the liquid feeding joint leading to a feed water pipe placed along the path of movement, and the liquid receiving joints 8, 19 are connected to the ends of respective extensible hoses 11, 21.