Disclosed is an infusion port for regulating the inflow of an aqueous solution of an aqueous-solution pack into an external wringer spike as at least part of the wringer spike is inserted or withdrawn. The infusion port comprises an inflow part, a securing part, and a cover part. The inflow part is formed with at least one first inflow hole into which the wringer spike is inserted, so as to allow the inflow of the aqueous solution of the aqueous-solution pack as the wringer spike is inserted. The securing part is formed so as to surround at least part of the inflow part and is formed with a movement hole at one end such that the first inflow hole of the inflow part moves to the outside and the inside as the wringer spike is inserted or withdrawn, and secures the inflow part when the first inflow hole moves to the outside. The cover part houses the securing part on the inside, and is formed with a second inflow hole at one end so as to allow the inflow of the aqueous solution upon partial insertion into an inflow hole disposed on the aqueous-solution pack. Consequently, as the first inflow hole of the inflow part moves outside or inside the securing part, it is possible to regulate the flow of the aqueous solution of the aqueous-solution pack through the first inflow hole and into the wringer spike disposed inside the inflow part.
