A stent to be implanted in a lumen in a living body comprises a stent main body, and a polymer layer provided on a surface of the stent main body, wherein the polymer layer comprises a first biologically/physiologically active substance, and nano- or micro-capsules composed of a first biodegradable polymer and comprising a second biologically/physically active substance therein, and the second biologically/physically active substance is released after the first biologically/physiologically active substance is released to the exterior of the stent.
