To enable an antifreezing agent sprinkler device to be installed in a small place by forming the top of a liquid storage vessel having a liquid storage tank into a foundation part on which a control board is mounted is such a manner as protruded above the ground, to prevent damage to piping and wiring by eliminating the need to extend then and to make it possible to easily perform the work of installing the entire device in a short time.

A liquid storage tank 4 made of stainless steel to store an antifreezing agent comprises a tank main body 5 and a cube which is smaller than the tank main body 5, and is formed of a control board support 6 projecting upward from the tank main body 5. The outside of the liquid storage tank 4 is covered with a protection 15 made of reinforced concrete, to constitute a liquid storage vessel 3. The liquid storage vessel 3 has its lower part buried in the ground to serve as a buried part, and has its upper part formed into a foundation part on which a control board 23 is mounted while projecting above the ground.