Abstract: There is disclosed an extruded plastic molding intended for use as interior corner molding for wall paneling and the like. The molding is particularly suited for the interior corner between wall and ceiling paneling employed in mobile homes or motor vehicles such as vans and the like since the molding has channel and groove means to receive adjacent panels at included angles from 90 to about 130 degrees. The molding comprises a first flange and a second flange coextensive therewith at an included angle from 90 to about 130 degrees with a coextensive, bulbous, hollow-form section which has one side wall parallel to and spaced apart from the first flat flange to define a narrow channel therebetween. The opposite side of the bulbous hollow form section has a rabbet groove parallel to and spaced apart from the second flat flange. The channel and rabbet groove receive the adjoining edges of the wall paneling.