An arched door frame for use within an arched opening in a framed, wallboard clad wall comprises: two similar door frame side portions each having a lower straight portion, an upper rounded portion, and an upper connection edge portion; wherein each door frame side portion has a jamb having a width generally equal to a stud width and two thicknesses of wallboard, and a contoured casing attached to both a front and rear edge portion of the jamb; and, frame side alignment and connection maintenance means to centrally align and maintain the two frame side portions in close proximity. In a preferred aspect the frame alignment means comprises clip holes and dowels, and the connection maintenance means comprises a front and back U shaped clip having opposite ends which are received in the clip holes, one clip hole in an outer edge of each jamb side portion.