A spinning reel spool according to a first aspect of the present invention is a spinning reel spool that delivers fishing line forward. The spinning reel spool comprises a spool body and a ring member. This spool body has a body portion and a protruding portion. The protruding portion is integrally formed on a front side of the body portion. The protruding portion is annularly arranged and protrudes from the body portion in an axial direction of the spool body. The ring member is disposed on an outer circumferential portion of the protruding portion of the spool body. The ring member is held between the body portion and a plastically deformed part of the protruding portion.本發明之課題在於謀求提高捲筒之耐久性。本紡車式捲線器100之捲筒4包括捲筒本體41、及環形構件8。捲筒本體41包含本體部4a、4b、4c及環狀突起4d。環狀突起4d係一體地形成於本體部4a、4b、4c之前側。環狀突起4d能塑性變形。環形構件8配置於捲筒本體41之環狀突起4d之外周部。環形構件8係藉由利用推壓力使捲筒本體41之環狀突起4d之至少一部分塑性變形，而由環狀突起4d之塑性變形部4k與本體部4a、4b、4c予以夾持。
