An extrusion noodle-making machine includes a mixer configured to produce noodle dough by mixing a noodle sheet raw material that is a mixture of raw material powder, and water or a liquid seasoning. The extrusion noodle-making machine produces a noodle sheet by further pressing the noodle dough extruded from the mixer into a dough in-pressing opening of a nozzle connected to a discharge opening of the mixer and extruding the noodle dough from a noodle sheet outlet of the nozzle while extracting gas from the noodle dough using a vacuum pump at a pressure of -0.06 to - 0.095 MPa (gauge pressure). At a predetermined position between the dough in-pressing opening and the noodle sheet outlet, the cross-sectional shape of a dough passage extending from the dough in-pressing opening to noodle sheet outlet of the nozzle has a smaller lateral width near a longitudinal central part of the cross-sectional shape than the lateral width at both longitudinal ends.
