A stent indwelling device configured to place a tube stent in a lumen tissue, the stent indwelling device comprising: a guide catheter having a longitudinal axis and configured to be inserted into the tube stent from a distal end side of the guide catheter; and a pusher catheter having a lumen into which the guide catheter is inserted, wherein the guide catheter includes: a core section having flexibility, the core section being longer than a dimension in an axial direction of the tube stent; an outer layer section having a tube shape surrounding an outer circumference of the core section, the outer layer section being fixed to the core section; a stent protection section disposed between the core section and the outer layer section, being longer than the dimension in the axial direction of the tube stent, being formed in an annular shape about the longitudinal axis when seen from a direction along the longitudinal axis, having stiffness resisting compression inward in a radial direction perpendicular to the longitudinal axis, and having flexibility in a direction in which the guide catheter is curved; and a stopper having a protrusion formed on at least one of the core section and the outer layer section and configured to protrude toward the space between the outer layer section and the core section, and to allow expansion of the stent protection section in the direction along the longitudinal axis and restrict movement of the stent protection section in the direction along the longitudinal axis with respect to the core section; wherein the stent protection section includes an element wire having a spiral structure of tight winding, and wherein both ends of the stent protection section are configured not to be fixed to the core section and the outer layer section, respectively. a guide catheter having a longitudinal axis and configured to be inserted into the tube stent from a distal end side of the guide catheter; and a pusher catheter having a lumen into which the guide catheter is inserted, wherein the guide catheter includes: a core section having flexibility, the core section being longer than a dimension in an axial direction of the tube stent; an outer layer section having a tube shape surrounding an outer circumference of the core section, the outer layer section being fixed to the core section; a stent protection section disposed between the core section and the outer layer section, being longer than the dimension in the axial direction of the tube stent, being formed in an annular shape about the longitudinal axis when seen from a direction along the longitudinal axis, having stiffness resisting compression inward in a radial direction perpendicular to the longitudinal axis, and having flexibility in a direction in which the guide catheter is curved; and a stopper having a protrusion formed on at least one of the core section and the outer layer section and configured to protrude toward the space between the outer layer section and the core section, and to allow expansion of the stent protection section in the direction along the longitudinal axis and restrict movement of the stent protection section in the direction along the longitudinal axis with respect to the core section; a core section having flexibility, the core section being longer than a dimension in an axial direction of the tube stent; an outer layer section having a tube shape surrounding an outer circumference of the core section, the outer layer section being fixed to the core section; a stent protection section disposed between the core section and the outer layer section, being longer than the dimension in the axial direction of the tube stent, being formed in an annular shape about the longitudinal axis when seen from a direction along the longitudinal axis, having stiffness resisting compression inward in a radial direction perpendicular to the longitudinal axis, and having flexibility in a direction in which the guide catheter is curved; and a stopper having a protrusion formed on at least one of the core section and the outer layer section and configured to protrude toward the space between the outer layer section and the core section, and to allow expansion of the stent protection section in the direction along the longitudinal axis and restrict movement of the stent protection section in the direction along the longitudinal axis with respect to the core section; wherein the stent protection section includes an element wire having a spiral structure of tight winding, and wherein both ends of the stent protection section are configured not to be fixed to the core section and the outer layer section, respectively.