A process for producing starch noodles, which comprises adding 45-55 parts by weight of hot water to 100 parts by weight of starch obtained from at least one member-selected from the group consisting of potato, sweet potato, tapioca, corn, wheat and a product thereof followed by being mixed to prepare large particles of dough and then extruding the dough under degassing at degrees of vacuum of not less than 650 Torr to produce a dough sheet. Starch noodles can be produced efficiently in simple procedures without separately preparing starch paste and without using special rollers. Further, starch noodles thus produced are highly transparent and less melted by boiling.