The present invention discloses a window which treats effectively
dew-water generated on a window glass to prevent dust,
stain and bad smell from being generated and capable of storing
dew water in a means for treating
dew-water for a certain time to maintain properly an indoor
humidity and enhance the air-tightness, water-tightness and adiabatic property. The window according to the present invention comprises a window frame including a vertical frame for supporting a vertical side of a window glass and a horizontal frame for supporting a horizontal side of the window glass; and a dew-water treating means including a dew-
water flow passage provided on the horizontal frame and a drainage trap provided on the window frame for discharging dew water introduced from the dew-
water flow passage and stored therein to an outside. Here, the drainage trap comprises a dew-water inflowing port being communicated in fluid with the dew-
water flow passage; a dew-water storing space for storing dew-water in-flowed through the dew-water inflowing port; and a dew-water drainage port being communicated in fluid with an upper portion of the dew-water storing space for discharging dew-water stored in the dew-water storing space.