| 摘要 |
PROBLEM TO BE SOLVED: To provide a band window capable of exerting a proper airtight state by preventing an airtight member from being bent in attachment of the airtight member, while improving airtightness on the four sides of the band window.SOLUTION: A band window includes a mullion 1 and a semi-external sash coupled to the mullion 1 are provided. A tight material 5a is arranged in an indoor direction in such a manner as to adjoin a side surface of the mullion 1, in a position almost consistent with a position to fix the semi-external sash to an opening of a building in a depth direction. The semi-external sash abuts, from an indoor side, on the tight material 5a arranged in such a manner as to adjoin the side surface of the mullion 1. |
