Patent ID: 7303542

Claim:
A mixing/charging port for medical treatment comprising: a disk-like valve having a slit that forms an insertion hole at the center, a seating for supporting a rear surface of the periphery of the valve with the center of the rear surface of the valve left unsupported, the seating having a concave covered by the valve and a passage laterally passing through the concave, and a cover for restraining the valve by covering a front surface of the periphery of the valve with the center of the front surface of the valve left uncovered, wherein: an inner periphery forming a fitting hole of the cover works as an anchor for anchoring an insertion member to the mixing/charging port in a way in which the insertion member is fitted to the fitting hole when the insertion member is inserted into the slit, wherein when the insertion member is inserted into the slit so as to split edges formed by the slit of the valve, a part along the edges is depressed by the insertion member, and a tip of the depressed part of the valve is brought into contact against an inner bottom surface of the concave of the seating.