This invention relates to a fishhook child line having a connection device, comprising a connection device and a fishhook child line. The connection device comprises a main body sheet having an annular hole and a hook opening located oppositely, wherein the hook opening has an external hooking arm and a spring piece having a fixed end and a movable end, wherein the movable end is adjacent to the hook opening and has a width adjustable passage with the external hook arm therebetween. The fishhook child line has a fishing line main body and a fishhook. The fishing child line main body has two end parts respectively tied to the annular hole of the connection device and the fishhook. The fishhook child line is combined to the 3-way swivel of the mother line via the connection device and either an engaging or a releasing between the connection device and the 3-way swivel is achieved by an inwardly pressing operation of the movable end of the spring piece of the connection device.一種具有連結器之魚鉤子線,包括一連結器與一魚鉤子線。連結器包含:一本體片,具有位於相對向的一環孔與一鉤口,鉤口具有一外鉤臂;以及一彈片,具有一固定端與一活動端,活動端鄰向鉤口,且與外鉤臂之間具有一可調節寬度的通道。魚鉤子線具有一子線本體與一魚鉤,子線本體的二端部分別繫結於連結器的環孔及魚鉤。魚鉤子線藉著連結器結合於母線的三叉轉環,依連結器之彈片的活動端的內壓操作,達成連結器與三叉轉環之間的結合或脫離。100‧‧‧連結器110‧‧‧本體片111‧‧‧環孔112‧‧‧鉤口114‧‧‧通道115‧‧‧凹槽120‧‧‧彈片121‧‧‧固定端122‧‧‧活動端200‧‧‧魚鉤子線210‧‧‧子線本體211‧‧‧第一端部212‧‧‧第二端部220‧‧‧魚鉤300‧‧‧母線400‧‧‧三叉轉環410‧‧‧第一轉環420‧‧‧第二轉環421‧‧‧第一端環422‧‧‧第二端環
