Extrusion noodle-making machine and extruded noodle ribbon

An extrusion noodle-making machine (2) for manufacturing a noodle ribbon (14) using a mixer (4), which mixes the noodle ribbon starting material in which the starting material powder and water or liquid seasoning are mixed to form the noodle dough, and pressing the noodle dough extruded from the mixer into the dough in-pressing opening (6a) of a nozzle (6), which is connected to the discharge opening of the mixer, while further extracting gas using a vacuum pump (12) at a pressure of -0.06 MPa to -0.095 MPa (gauge pressure) and extruding the noodle dough from the noodle ribbon outlet (6b) of the nozzle. The cross-sectional shape of the dough passage that continues from the dough in-pressing opening to the noodle ribbon outlet of the nozzle is such that at a specified position between the dough in-pressing opening to the noodle ribbon outlet, the width in the short direction of the cross-sectional shape near the middle of the long direction is smaller than the width in the short direction at both ends of the long direction.