A biodegradable stent that is degraded in a living body includes a stent body that is made of a biodegradable material and is deformed to have an expanded diameter in the living body and a biodegradable drug-coating portion formed on the stent body. The drug-coating portion is degraded, in an expansion retention period during which an expansion retention force (radial force) of the deformed diameter-expanded stent body that acts on an inner wall of a lumen thereof is maintained, and before 60% of a degradation period from indwelling of the stent body in the living body to complete degradation thereof elapses.
