Abstract: This steel stock cooling apparatus has injection pipes in each of which one end is communicated with a water supply portion, the other end is formed into an injection opening for injecting water supplied from the water supply portion and the intermediate portion is formed with at least one air introducing hole communicated with an air supply portion, whereby the water supplied is mixed with air supplied from the air introducing hole so as to be injected in the forms of droplets. The pattern of the injection is formed into an ellispe having its major axis in the direction of the air introducing hole, and desired patterns can be formed by changing the position where the air introducing hole is installed.