An indwelling catheter (10) including: a hollow catheter base (14) having a tip and a back end, the back end being able to receive and connect a male connector (24)； a tube (12) provided at the tip of the catheter base (14)； a flexible hemostasis valve (16) installed inside the catheter base (14)； a pusher (18) installed at a back of the hemostasis valve (16)； and a pusher guide (20) installed between the pusher (18) and the catheter base (14). The pusher (18) has a hollow constitution whose taper reduces in diameter facing its tip. The pusher guide (20) is able to restrict a position of the pusher (18) at a first position where the pusher (18) does not push open the hemostasis valve (16) and a second position where the taper of the pusher (18) is positioned inside the hemostasis valve (16) and pushes open the hemostasis valve (16).
