A method for manufacturing hydrogel particles includes a cooling step for cooling an aqueous solution wherein a gelling agent forming a non-crosslinked hydrogel is dissolved is cooled to a temperature lower than the gel point of the aqueous solution. In the cooling step, the cooled material of the aqueous solution is stirred at least at the gel point, and after reaching the gel point, stirring energy of 400 KW * sec./m3 or greater is applied to the cooled material of the aqueous solution by stirring with a required stirring motive force of 0.8 kW/m3 per unit volume.本發明之水凝膠粒子之製造方法包括冷卻步驟，該冷卻步驟係將溶解有形成非交聯型水凝膠之凝膠劑之水溶液冷卻至低於上述水溶液之凝膠化點之溫度。於上述冷卻步驟中，至少於上述凝膠化點對上述水溶液之冷卻物進行攪拌，且於達到上述凝膠化點以後，藉由每單位體積之攪拌所需動力為0.8 kW/m3以上之攪拌對上述水溶液之冷卻物賦予400 kW×秒/m3以上之攪拌能。
