PURPOSE: To form the member having different sectional shape partially with the extrusion method.

CONSTITUTION: A shape of member having max. area which can be imaginable is drilled at a die 300 close attached to a container continuously as die holes 302, 304, 306. When A die 400 which is able to move in sliding in the extent of die holes 302, 304, 306 against the die 300 is connected to the die hole 302, die holes 402, 404 which form the sectional shapes of member are formed, and when a material is extruded from a hole formed with die holes 304, 302, 402, 404 while moving the die 400 against the die 300, the member material 340 that the sectional shape is changed gradually according to the die holes 302, 402, 404 which change the shape by following the moving die 400.