PROBLEM TO BE SOLVED: To provide a stent and stent graft showing excellent antithrombogenicity to effectively suppress a thrombotic infarct after in vivo dwelling and showing a low restenosis rate. SOLUTION: This stent 10 comprises a base body 11 covered with a coating layer 12 consisting of a polymer material containing at least sarpogrelate hydrochloride and capable of gradually releasing the sarpogrelate hydrochloride in a living body. This stent graft comprises a tubular body formed of a polymer material containing sarpogrelate hydrochloride and capable of gradually releasing the sarpogrelate hydrochloride in a living body, and fitted thereon.