Treatment liquid spray nozzle

A treatment liquid spray nozzle comprising:

• a body having a mixing space portion formed therein to mix a first treatment liquid and a second treatment liquid, a first inlet formed on top thereof in such a way as to communicate with the mixing space portion to allow the first treatment liquid to flow into the mixing space portion, a second inlet formed on the side peripheral surface thereof in such a way as to communicate with the mixing space portion to allow the second treatment liquid to flow into the mixing space portion, and a spray hole formed on the bottom thereof in such a way as to communicate with the mixing space portion;
• and
• a rotational flow guiding part disposed in the mixing space portion in such a way as to allow both ends thereof to face the first inlet and the spray hole respectively and having a spiral guide with a spiral groove formed on the outer peripheral surface thereof.