PURPOSE: To extrude extruded materials having various three-dimensional shapes by variously combining material cunducting parts through which an extruding material is conducted.

CONSTITUTION: A 1st square annular forming clearance 22 is composed of the combination of four unit forming clearances 24a, 24b, 24c, 24d which are mutually communicated in their four corner parts. And mutually independent material conducting parts 23a, 23b, 23c, 23d are respectively communicated to each unit forming clearance 24a, 24b, 24c, 24d and the extruding materials which flow through each material conducting part 23a, 23b, 23c, 23d are pressed to stick in the mutual communicating parts of each unit forming clearance 24a, 24b, 24c, 24d in the 1st forming clearance 22.