Window frame having outer frame member made of resin

摘要

In a resin window frame (2, 4), an outer frame member (2a, 4a) made of resin blended with cellulose-based fine powder has a hollow portion, and a wooden core member (2b, 4b) having shape and size corresponding to the hollow portion of the outer frame member (2a, 4a) is engagedly inserted into the hollow portion of the outer frame member (2a, 4a).