The disclosed invention relates to a wind power generation device for a window trim frame, the wind power generation device: enabling alignment and provision in a prefabricated manner so as to fit the size of a window trim frame or the window frame of a general house or a building such that the installation thereof is simplified; manufactured in a small size such that purchase and production costs are relatively lower than those of other power generation facilities and the like; and charging, with produced electric energy, a storage battery provided at the end thereof and, simultaneously, enabling a charging completion to be immediately checked, thereby easily being used.