The macaroni has a hollow portion formed along the noodle string direction and has a substantially circular outer peripheral wall portion and a substantially circular hollow wall portion located inside the outer peripheral wall portion, A plurality of grooves are formed along the direction, and each of the plurality of grooves has a cross-sectional shape extending in a spiral shape between the outer peripheral wall portion and the hollow wall portion in the cross section of the noodle strings, and 0.3 to 2 respectively. It has an opening width of 5 mm.マカロニは、麺線方向に沿って中空部が形成されると共に麺線の横断面がほぼ円形の外周壁部と外周壁部の内側に位置するほぼ円形の中空壁部とを有し、麺線方向に沿って複数の溝が形成され、複数の溝は、麺線の横断面において、外周壁部と中空壁部との間で渦巻き状に延びる断面形状を有すると共に、それぞれ０．３～２．５ｍｍの開口幅を有する。
