This invention relates to a spray hole piece and an atomization module using the same, wherein the atomization module is disposed on a chamber body and comprises a piezoelectric ring piece, a check ring piece, and a spray hole piece. The check ring piece is disposed at one side of the piezoelectric ring piece. The spray hole piece appears a round disc shape and is clamped between the piezoelectric ring piece and the check ring piece. The spray hole piece has a plurality of percussion holes and a plurality of first upheaved parts. Those first upheaved parts appear a non-circular shape and are upheaved and protruded toward the piezoelectric ring piece or the check ring piece to form a radially or circularly arranged multi-curved surface structure with specific geometric shaped patterns. Accordingly, the spray hole piece of this invention can increase the atomization area, atomization amount, and the liquid-gas exchange rate, and can prevent the center of the spray hole piece from breaking due to stress concentration when being vibrated.
