Assembly type ventilation device for windows and doors

An assembly type ventilation device for windows and doors, the assembly type ventilation device comprising:

• a filter frame formed with an insertion part to which an air filter module is detachably inserted and fixed;
• a first fixing part installed on one side of the filter frame and fixed to a window;
• and
• a second fixing part installed on an opposite side of the filter frame and fixed to a window frame,
• wherein the filter frame includes a plurality of filter frames stacked vertically and detachably fixed to each other by a magnetic member, and the magnetic member includes:
• a first magnetic member fixed to an upper surface of the filter frame;
• and
• a second magnetic member fixed to a lower surface of the filter frame, in which surfaces facing the first magnetic member and the second magnetic member are coated with silicone while the filter frames are stacked.