Abstract
In the Sahengrok(使行錄) written by the Joseon missions to Japan, who was dispatched to Japan in 1607, recorded a method of opening and closing fittings without hinges by sliding them left and right. In this study, I clarified the introduction time and architectural significance of pocket windows and doors in Korean architecture through the analysis of the Sahengrok in which the use of the new opening and closing type fittings is first appeared, and other historical documents of that period. It is thought that the beginning of the window opens and closes by sliding the window to the left and right was the Yeongchang(映窓) installed in the Ondol room between the end of the 18th century and the beginning of the 19th century. The Yeongchang, which changed the window of the Ondol room to a double-glazed window, is known as Milchang (推窓) in the private sector, and the built-in pocket called Gapchan (甲窓) in which the window Yeongchang is stored has also been universalized. In this way, the Yeongchang with Gapchang came to be called Midaji in the private sector, it means the pocket windows and doors. With the installation of pocket windows and doors in architecture, the elevation of the Ondol room had been standardized, the indoor environment became more comfortable by the insulating effect that blocks moisture and cold from the outside.