Sliding type balcony

PURPOSE: A movable balcony is provided to control the amount of supplied natural sunlight and to save energy because artificial lighting facilities or ventilation facilities are not required. CONSTITUTION: A movable balcony(200) is composed of a top surface(220), a bottom surface(240), a front surface(260), and side surfaces. The movable balcony is located between a ceiling slab(100) and a floor slab(300) and can be moved toward inside or outside. A balcony floor plate connected to the front surface of a building is formed in order to support the bottom of the balcony when the balcony is moved to outside.