Patent ID: 8641012

Claim:
A medical connector comprising: a housing having a fluid flow path internally; a disk shaped elastic valve element mounted on an aperture portion of the fluid flow path of the housing, for which an external flow path is connectable to the fluid flow path of the housing via the valve element; the disk shaped elastic valve element having: a slit in a center portion; an annular constricted section provided by forming annular grooves extending in a circumferential direction respectively at both inner and outer surfaces of an outer peripheral portion thereof; and an annular fixation section provided at an outer peripheral side that is located outside of the annular constricted section; a valve receiving seat being provided at an inner peripheral edge portion of the aperture portion of the fluid flow path of the housing; an annular ring being adhered to the aperture portion, the annular fixation section of the elastic valve element being sandwiched and supported by the valve receiving seat and the annular ring; and engaging projections respectively formed projecting on facing surfaces of the valve receiving seat and the annular ring, wherein the engaging projections engage with the annular grooves formed on both the inner and outer surfaces of the elastic valve element, at least one of the valve receiving seat engaging projection and the annular ring engaging projection is divided in the circumferential direction to have a plurality of projection-divisions, and auxiliary peripheral walls are provided between the circumferentially adjacent projection-divisions with a projection dimension smaller than that of the projection-divisions, and both of the projection-divisions and auxiliary peripheral walls are placed within the annular groove.