An abrasive peening apparatus, comprising: a processing tank configured to store abrasive particles and peening liquid, the processing tank including a bottom portion in which a workpiece is immersed in the peening liquid; a dispensing chamber (15, 115) having a plurality of recesses (17, 117) on an upper surface, the dispensing chamber (15, 115) disposed in the bottom portion, the dispensing chamber (15, 115) configured to dispense the peening liquid; a stirring nozzle disposed at a center of each of the recesses (17, 117) directing vertically upward, the stirring nozzle connected to the dispensing chamber (15, 115) to eject the peening liquid; a peening nozzle immersed inside the processing tank, the peening nozzle configured to eject the peening liquid toward the workpiece; and a moving device configured to move the peening nozzle relative to the workpiece, wherein the stirring nozzle includes a body extending upward, a peening liquid inlet located at a lower end of the body, an internal outlet located inside the body, the internal outlet connected to the peening liquid inlet, an outlet located at an upper end of the body, a passage connecting the internal outlet and the outlet, the passage extending vertically inside the body, and an abrasive particle suction port located on an outer surface of the body inside the recess (17, 117), the abrasive particle suction port connected to a lower end of the passage. a processing tank configured to store abrasive particles and peening liquid, the processing tank including a bottom portion in which a workpiece is immersed in the peening liquid; a dispensing chamber (15, 115) having a plurality of recesses (17, 117) on an upper surface, the dispensing chamber (15, 115) disposed in the bottom portion, the dispensing chamber (15, 115) configured to dispense the peening liquid; a stirring nozzle disposed at a center of each of the recesses (17, 117) directing vertically upward, the stirring nozzle connected to the dispensing chamber (15, 115) to eject the peening liquid; a peening nozzle immersed inside the processing tank, the peening nozzle configured to eject the peening liquid toward the workpiece; and a moving device configured to move the peening nozzle relative to the workpiece, wherein the stirring nozzle includes a body extending upward, a peening liquid inlet located at a lower end of the body, an internal outlet located inside the body, the internal outlet connected to the peening liquid inlet, an outlet located at an upper end of the body, a passage connecting the internal outlet and the outlet, the passage extending vertically inside the body, and an abrasive particle suction port located on an outer surface of the body inside the recess (17, 117), the abrasive particle suction port connected to a lower end of the passage. a body extending upward, a peening liquid inlet located at a lower end of the body, an internal outlet located inside the body, the internal outlet connected to the peening liquid inlet, an outlet located at an upper end of the body, a passage connecting the internal outlet and the outlet, the passage extending vertically inside the body, and an abrasive particle suction port located on an outer surface of the body inside the recess (17, 117), the abrasive particle suction port connected to a lower end of the passage.