The present invention relates to a connective installation structure for modularized windows and doors, the connective installation structure successively arranging and connectively installing, in the horizontal direction, modularized sliding windows, doors, or door windows that form the window and doors of a building, with fixed windows arranged in the spaces between the windows and doors. The present invention provides the connective installation structure for modularized windows and doors so as to provide a simplified double frame support structure in which the connective structure lateral section view of the frame, formed by the elevation view of the elements that form the connective installation structure of windows and doors, comprises just (window glass or door panel)-window sash frame-window frame-(fixed window glass), the connective installation structure for windows and doors successively arranging and connectively installing, in the horizontal direction, the sliding-type windows, doors, or door widows, with fixed windows arranged in the spaces therebetween.