To obtain the die, by which plural piece simultaneous extrusion is made possible with a simple constitution, further plural hollow materials can be simultaneously extruded in good shape precision.

A male die is constructed so that two core holding holes 15, 15 are arranged to a bridge part 13 of a die member 6 for core holding and the cores 5, 5 are respectively inserted/held to these core holding holes 15, 15, a female die 3 is arranged with two of forming hole bearing parts 21, 21 to form the peripheral part of a hollow material E, in the state both male/ female dies 2, 3 are assembled, two forming clearances 22, 22 are independently formed each other.