An object of the present invention is to prevent a cover member from easily coming off a reel body of a reel unit in a spinning reel.An interlocking groove 10c is formed on the rear upper surface of a chassis part 10 so as to be exposed outside. A mounting hole 13b that is opened backward is formed in a rod attachment leg portion 13. A first cover member 14 includes a pivot shaft portion 14b that is pivotably mounted to the mounting hole 13b, and a first interlocking protrusion 14c that is allowed to be interlocked with the interlocking groove 10c when the pivot shaft portion 14b is mounted to the mounting hole 13b and the first cover body 14a is pivoted around the axis of the mounting hole 13b. A second cover member 15 is configured to cover the surrounding of the first interlocking protrusion 14c that is interlocked with the interlocking groove 10c in the lower side of the rear part of the first cover member 14 by a retaining portion 15b that is disposed on the upper part of the second cover member 15.對於紡車式捲線器的捲線器本體,使蓋構件不易從捲線器外殼脫落。在框體部(10),在後部上面形成露出外部的卡止溝(10c),在竿安裝腳部(13),形成朝後方開口的安裝孔(13b),第1蓋構件(14),主要具有:可擺動地裝設於安裝孔(13b)的擺動軸部(14b)、及將擺動軸部(14b)裝設於安裝孔(13b)且將第1蓋本體(14a)朝安裝孔(13b)的軸芯周圍擺動時可卡止於卡止溝(10c)的第1卡止突起(14c)。第2蓋構件(15),是藉由設置於上部的防止脫落部(15b),覆蓋供卡止於第1蓋構件(14)的後部下方的卡止溝(10c)用的第1卡止突起(14c)的周圍。(二)、本代表圖之元件符號簡單說明:2‧‧‧捲線器本體10‧‧‧框體部10c‧‧‧卡止溝10d‧‧‧螺孔13‧‧‧竿安裝腳部13b‧‧‧安裝孔14‧‧‧第1蓋構件14a‧‧‧第1蓋本體14b‧‧‧擺動軸部14c‧‧‧第1卡止突起14d‧‧‧第2卡止突起15‧‧‧第2蓋構件15a‧‧‧第2蓋本體15b‧‧‧防止脫落部15c‧‧‧突出部15d‧‧‧貫通孔90‧‧‧螺絲構件100‧‧‧空洞部
