PROBLEM TO BE SOLVED: To provide a stent manufacturing device capable of improving efficiency of a coating treatment on works by securely exposing outer surfaces of individual works to a vapor-deposition gas and eliminating peeling of a polymer like parylene.SOLUTION: A coating device 1 is configured to coat a work (for example, a stent W) by placing the work in a chamber 3 and passing a monomer gas into the chamber 3, and thereby vapor-depositing a polymer produced by polymerization of the monomer on the work. In the chamber 3, a work holding device 20 which holds a plurality of works is arranged and includes a rotary part 60 arranged rotatably in the chamber 3 and a plurality of work supports 30 fixed to the rotary part 60 mutually at intervals and run in the respective works to hold the respective works.
