A wet type exhaust gas desulfurization apparatus comprising: an absorption tower configured to desulfurize exhaust gas by causing the exhaust gas to come into gas-liquid contact with an absorbent; a spray mechanism configured to spray the absorbent into the absorption tower; an oxidization mechanism having an oxidization mechanism main body that includes an oxygen supply tube and which is attached on the side surface of the absorption tower to the bottom portion of the absorption tower, the oxidization mechanism being configured to supply oxygen from the oxidization mechanism main body to absorbent accumulating inside the absorption tower via the oxygen supply tube; a circulation mechanism configured to feed the absorbent from a discharge port, which is formed in the bottom portion of the absorption tower, to the spray mechanism; and a pair of liquid ejection mechanisms including a pair of hydraulic nozzles configured to eject liquid into the absorption tower respectively; characterized in that multiple oxidization mechanisms are arranged apart from one another in a horizontal direction relative to the discharge port of the absorption tower such that there is a gap from the discharge port of the absorption tower in the horizontal direction and the oxidation mechanism is provided at an opposing location against the discharge port; and wherein the pair of the hydraulic nozzles is installed to mutually opposing side surfaces in the bottom portion of the absorption tower respectively such that liquid ejection ports of the pair of the hydraulic nozzles are provided at mutually opposing locations between the oxidization mechanism and the discharge port of the absorption tower. an absorption tower configured to desulfurize exhaust gas by causing the exhaust gas to come into gas-liquid contact with an absorbent; a spray mechanism configured to spray the absorbent into the absorption tower; an oxidization mechanism having an oxidization mechanism main body that includes an oxygen supply tube and which is attached on the side surface of the absorption tower to the bottom portion of the absorption tower, the oxidization mechanism being configured to supply oxygen from the oxidization mechanism main body to absorbent accumulating inside the absorption tower via the oxygen supply tube; a circulation mechanism configured to feed the absorbent from a discharge port, which is formed in the bottom portion of the absorption tower, to the spray mechanism; and a pair of liquid ejection mechanisms including a pair of hydraulic nozzles configured to eject liquid into the absorption tower respectively; characterized in that multiple oxidization mechanisms are arranged apart from one another in a horizontal direction relative to the discharge port of the absorption tower such that there is a gap from the discharge port of the absorption tower in the horizontal direction and the oxidation mechanism is provided at an opposing location against the discharge port; and wherein the pair of the hydraulic nozzles is installed to mutually opposing side surfaces in the bottom portion of the absorption tower respectively such that liquid ejection ports of the pair of the hydraulic nozzles are provided at mutually opposing locations between the oxidization mechanism and the discharge port of the absorption tower.