PROBLEM TO BE SOLVED: To provide a connector which is provided in an infusion line and can connect another infusion line or a member to be connected of various medical devices or the like to the infusion line.SOLUTION: A connector comprises: a connector body (10) having a flow path (17) an insert (23) whose tip serves as a connection opening (24) of the flow path (17) a valve body (22) formed of an elastic body and disposed at the tip of the insert to close the connection opening and a cap (21) for clamping the valve body together with the insert. The valve body comprises: a valve body part (30) having slits (32, 33) an inner convex part (35) formed in an annular shape having an outer diameter smaller than the inner diameter of the insert, and projecting from a bottom surface (30b) of the valve body part and a pair of outer convex parts (36) arranged point symmetrically with an axial center of the inner convex part as a center, in which each projects from the bottom surface on the radial outside of the inner convex part and is disposed inside the insert.SELECTED DRAWING: Figure 3
