A needle-less connector (10) including a housing (18) having a drug solution flow path (28), and an elastic valve body (14). An end surface of the housing (18) on a side of a tip end opening (41) of the drug solution flow path (28) constitutes a protruding support surface (32) whose center section protrudes and slopes in a direction of a foot, and the elastic valve body (14) is superposed onto the protruding support surface (32) in a state of close contact therewith. Insertion of a male luer (92) into a slit (62) of the elastic valve body (14) causes expanding deformation of the elastic valve body (14) along the protruding support surface (32). A flexion section (42) is formed on a sloped surface of the protruding support surface (32), and the sloped surface has different tilt angles on a foot section side (34) and on a crest section side (36) of the flexion section (42).
