1. An apparatus for manufacturing a three-dimensional netted structure, the three-dimensional netted structure comprising a plurality of filaments of resin, the filaments being helically and randomly entangled and thermally bonded together, the apparatus comprising:
an extrusion molding machine comprising a plurality of dies each having a mouthpiece with a plurality of holes;
a pair of endless conveyors provided with endless members;
a motor adapted to drive said endless members; and
a tank adapted to partly submerge said endless conveyors therein;
wherein said endless members comprise each a plurality of metal plate members fixed to a plurality of endless chains and wherein said metal plate members are stainless steel.