To simplify the configuration of a window screen A; to eliminate conventional screen stiles by installing the window screen monolithically with a window frame; to improve the exterior appearance of the whole of the sash; and also to enhance the external appearance of the window screen itself without decreasing the size of its opening even for a concealed type sash.

In a sash framing structured by building a sash 3 at an inner side of a window framing formed by combining a metal frame portion 2a and a resin frame portion 2b together, attaching grooves 41 are formed to frame members opposing each other of the resin frame portion 2b and then both the ends of a screen body 30 are fitted to the attaching groove 41 through an attachment 31.