PURPOSE: A protective screen device for a drain aperture is provided to stabilize a drainage function by preventing the blockage of a drain aperture in a civil structure and to prevent secondary damage due to the blockage of a drain aperture. CONSTITUTION: A protective screen device (100) for a drain aperture comprises a screen part (110). The screen part comprises a pair of main body frames (112) and a screen member (114). The pair of main body frames comprises a main body plate (113) which is formed with a through-hole (111). The screen member is connected to the main body plate and comprises a plurality of upper screens (114a) and a plurality of lower screens (114b).
