Male-side and female-side connectors for connecting first and second infusion tubes

摘要

A female-side connector having a lock mechanism for obtaining a favorable fastening force constantly. The female-side connector includes a central axis of a root in a male screw portion of a female-side lock portion that is screwed together with a female screw portion of a male-side lock portion in a male-side connector that intersects at a predetermined angle relative to a central axis of a thread.