To reduce the weight of a reel body without forfeiting the design of the rear portion of a reel body. The reel body 2 is the reel body of a spinning reel capable of delivering fishing line forward and is comprised of a housing 21, a cover member 22, and a guard member 23. The housing 21 has a housing space 21 a wherein the first side face is opened, a sidewall 21 b that demarcates the second side face of the housing space 21 a and opposes the first side face, and a rear wall 21 c that demarcates the rear face of the housing space 21 a. The protruding piece 21 d, which is the rear portion of the sidewall 21 b, extends more toward the rear than the rear wall 21 c. The cover member 22 is mounted to the housing 21 to cover the opening of the housing space 21 a. The guard member 23 is mounted from the rear of the housing 21 and the cover member 22 to form a space between the protruding piece 21 d and the rear wall 21 c.[課題]不會損失捲線器本體的後部的外觀的造形設計效果使捲線器本體輕量化。[技術內容]捲線器本體(2)，是可將釣線朝前方吐出的紡車式捲線器的捲線器本體，具備：框體(21)、及蓋構件(22)、及防護構件(23)。框體(21)，是具有：第1側面開口的收容空間(21a)、將與第1側面相面對的收容空間(21a)的第2側面劃界的側壁(21b)、及將收容空間(21a)的後面劃界的後壁(21c)。側壁(21b)的後部的突出片(21d)是比後壁(21c)更朝後方延伸。蓋構件(22)，是將收容空間(21a)的開口塞住的方式裝設於框體(21)。防護構件(23)，是使在突出片(21d)及後壁(21c)之間形成空間的方式，對於框體(21)及蓋構件(22)從後方裝設。
