Grooved noodles have three grooves formed along the noodle length direction. The transverse cross section of the noodle length has a substantially circular main outer shape. The grooves are positioned in the transverse cross section of the noodle length at 120° intervals in the circumferential direction, and extend in the same rotation direction relative to the center point of the transverse cross section of the noodle length. Each groove has a pair of mutually facing sides that extend from the opening of the groove toward the deepest part of the groove, a first opening end on the side closer to the center point out among the pair of sides, and a second opening end on the side farther from the center point among of the pair of sides. The acute angle formed in each groove by a straight line passing through the first opening end and the deepest part and a straight line passing through the first opening end and the center point is 12-28°. The area of a center region in each of the three grooves forming a triangle has three straight lines passing through the deepest part and the midpoint between the first opening end and the second opening end has a value of 6-34% relative to the area having the main outer shape when the three grooves are not present. The noodle length occupies 85% or more of the center region.
