PROBLEM TO BE SOLVED: To provide an airtight structure between a resin-made window frame and a window stile which allows an airtight member to be efficiently attached and burrs in a concave groove or at both ends of a fitting groove in the longitudinal direction generated during production of the resin-made window stile to be easily removed.;SOLUTION: A fitting groove 16 to which an airtight member 15 is attached is provided in the longitudinal direction of a stile member to constitute a window stile 10 at the inside of a concave groove 14 of at least one of front and rear walls 17 in the indoor to outdoor direction having the concave groove 14 of the window stile 10. The central axis L1 of the groove extends from a groove bottom 16a to an opening 16b of the fitting groove 16, tilting toward the outside of the opening 14b of the concave groove 14 from the inside of the concave groove 14. The fitting groove 16 has a width at a deep part wider than the opening width of the opening 16b.;COPYRIGHT: (C)2013,JPO&INPIT
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