Intravascular indwelling stent

An intravascular indwelling stent that is indwelled in a blood vessel, comprising:

• a stent main body being diametrically expandable and having a tubular shape;
• and
• a polymer film covering the stent main body, wherein
• through-holes are formed in the polymer film, the through-holes connecting an inside and an outside of a cylinder of the intravascular indwelling stent to each other and each having an opening size from 0.02 mm to 0.2 mm, inclusive,
• a ratio of an opening area of all the through-holes included in a unit area of an outer surface of the polymer film to the unit area is an opening occupancy,
• a ratio of a length of opening edges of all the through-holes included in a unit area of the outer surface of the polymer film to the unit area is a surface density of boundary,
• the opening occupancy is from 25% to 41%, inclusive, and
• the surface density of boundary is from 9.5/mm to 30/mm, inclusive.