A method for setting arrangement of spray nozzles in which uniform cooling is possible in the direction intersecting the threading direction perpendicularly with regard to a cooling system of a hot steel plate applied in order to obtain a uniform steel material having good shape characteristics by control-cooling a hot steel plate obtained by hot rolling while performing clamp threading by means of a clamp roll is provided. A method for setting arrangement of spray nozzles of a spray cooler having a wide quantity of water regulation range by using two kinds or more of nozzle different in quantity of water and spray region is also provided.Spray nozzles are arranged such that a value obtained by integrating the n-th power of collision pressure of cooling water spayed from the spray against the cooling surface in the threading direction between the clamp roll pairs falls within -20% of the maximum value in the threading direction, where 0.05=n=0.2.