A spool brake device for a dual-bearing reel according to a first aspect of the present invention is a device configured to electrically brake a spool rotatably mounted to a reel unit of the dual-bearing reel for allowing a fishing line to be wound thereabout. The spool brake device includes a spool brake unit including a magnet configured to rotate in conjunction with rotation of the spool, and a coil configured opposite to the magnet to generate electric current with rotation of the magnet, a tension detecting unit configured to detect and measure tension on the fishing line, and a spool control unit configured to control the spool brake unit by analog-controlling electric current flowing through the coil on the basis of how large the tension is.對於捲筒制動裝置,即使在線圈的電動勢發生參差不一,對於目標制動力仍可以將穩定的制動力朝捲筒賦予。捲筒制動機構(25),是將可旋轉自如地裝設於捲線器本體(1)並可捲附釣線的捲筒(12)電力地制動的裝置。捲筒制動機構(25),是具備:捲筒制動單元(40)、及張力檢出部(82)、及捲筒控制單元(42)。捲筒制動單元(40),是具有:與捲筒(12)連動地旋轉的磁鐵(61)、及與磁鐵(61)相面對配置並可發生對應磁鐵(61)的旋轉的電流的線圈(62)。張力檢出部(82),是檢出作用於釣線的張力。捲筒控制單元(42),是對應張力檢出部(82)所檢出的張力由類比控制流動於線圈(62)的電流的方式控制捲筒制動單元(40)。41‧‧‧旋轉數感測器42‧‧‧捲筒控制單元45‧‧‧調整鈕位置感測器46‧‧‧電流感測器47‧‧‧電流控制器48‧‧‧計算放大器55‧‧‧數位控制部55a‧‧‧DA輸出埠57‧‧‧類比控制部60‧‧‧旋轉件62‧‧‧線圈80‧‧‧目標制動力輸出部82‧‧‧張力檢出部82a‧‧‧扭矩檢出部83‧‧‧張力設定部84‧‧‧第1制動力設定部85‧‧‧第2制動力設定部
