A component for satisfactorily plugging a bone tunnel formed in surgery such as ACL reconstruction by regenerating bone in a space portion of the bone tunnel (e.g., a bone tunnel for an arthroscope), is provided in order to solve the problems in the conventional technologies. The plug component is made of a calcium phosphate-based material, comprises a porous part having a porosity of 50 to 85%, and has a cylindrical shape such that one of its bottom surfaces forms an angle of 30 to 60 degrees to its central axis.
