PURPOSE: To shape a low-cost door having excellent appearance by covering the surfaces of the core materials of a longitudinal style section and a lateral style section with decorative veneerings, inserting the end edge sections of the veneerings into the folding grooves of the core materials in a bent form, unifying the core materials and an architrave section thus forming the door.

CONSTITUTION: An upper core material 2 and a lower core material 3 and the surface and rear sides of these materials 2 and 3 are covered with decorative veneerings 4, 4 respectively, thus forming a lateral style section 1. Trapezoidal sectional-shaped architrave sections 2a, 3a are formed integrally to each outside of the upper core material 2 and the lower core material 3, fitting grooves 2b, 3b are formed at central sections on the outsides respectively, and a panel 5 can be inserted. Folding grooves 2c-3c are shaped from the surface and rear sides on the side face sides of the architrave sections 2a and 3a respectively. V cut sections V formed at the end edge sections of the decorative veneerings 4 are bent, and inserted into each folding groove 2c-3c. Accordingly, a neat low-cost door having excellent appearance can be shaped.