A Capsule-type sinkers include a first engagement member, a second engagement member, and a weight member. The first engaging member has a hollow first body and a first clamping mechanism. The second engaging element has a hollow second body and a second clamping mechanism. The first body and the second body can abut each other and surround an accommodating space, and the first clamping mechanism and the second clamping mechanism cannot be separated after only one-time carding. The weight member is disposed in the accommodating space, and the specific gravity of the weight member is greater than the specific gravity of water. The structure design of the first engaging element and the second engaging element can facilitates the filling of various weight elements other than lead, not only improve environmental protection but also reduces the material cost.一種膠囊式沉子，包含一第一接合件、一第二接合件，及一配重件。該第一接合件具有一呈中空狀的第一本體，及一第一卡制機構。該第二接合件具有一呈中空狀的第二本體，及一第二卡制機構。該第一本體與該第二本體能互相對接而圍繞出一容置空間，且該第一卡制機構與該第二卡制機構僅能一次性卡制後不分離。該配重件設置於該容置空間內，且該配重件的比重是大於水的比重。藉由該第一接合件與該第二接合件的互相卡制後不分離的結構設計，便於填入除了鉛以外的各種配重件，不但環保亦可降低材料成本。
