PURPOSE: To provide a perforated formed material extruding die which can securely extrude a prescribed form of perforated formed material having no thin wall, no underfill, etc., on a partition wall and hardly wear/defect a male die, further, can be repaired easily by a partial changeover of part of the structural member.

CONSTITUTION: The male die 1 is divided into plural split male die members 4, 5, 6, 7 having formed projecting parts 4a, 5a, 6a, 7a at the tip part and forming extruding material inflow ports 11, 12, 13 among them at the state they are combined with each other. Connecting members 15, 16 are arranged horizontally between adjacent split male die members. They are arranged in the tubular outer engagement member 18 as they are engaged with it.