An indwelling-type catheterizing apparatus is described, which includes an elastic tube, a stopping piece and a backflow prevention piece. The elastic tube has a main channel, a head end and a tail end opposite to the head end, in which the main channel has a first main channel exit and a second main channel exit located on the head end and the tail end respectively. The stopping piece is disposed on the head end. The backflow prevention piece is disposed in the main channel.一種留置型導尿裝置,包含彈性管、止擋件以及防逆流件。彈性管具有主通道以及相對之頭端與尾端,其中主通道具有第一主通道口與第二主通道口分別位於頭端及尾端。止擋件設於頭端上。防逆流件設於主通道中。100‧‧‧留置型導尿裝置110‧‧‧彈性管111‧‧‧主通道112‧‧‧副通道120‧‧‧止擋件140‧‧‧彈性卡固件
