simultaneous switching double-window

The present invention relates to a simultaneous opening and closing double-glazed window installed on a wall of a building for a purpose of lighting and ventilation. More specifically, according to the simultaneous opening and closing double-glazed window of the present invention, since an inner window and an outer window are fixedly coupled by a connecting clamp and are opened and closed at the same time, convenience of opening and closing operation is enhanced, vibration caused by a wind pressure is prevented, high rigidity is maintained, and watertightness is improved. The simultaneous opening and closing double-glazed window is composed of a double sealing structure of an inner window and an outer window. 본 발명은 건축물의 벽체에 채광과 환기를 위한 목적으로 설치되는 이중창에 관한 것으로서, 보다 상세하게는 내부창과 외부창을 연결클램프에 의해 고정 결합시켜 동시에 개폐가 이루어짐으로써, 개폐동작의 편리성과 풍압에 의한 떨림을 방지하고 고강성을 유지하며 수밀성을 향상시킨 동시 개폐형 이중창이다.