NOVELTY - At least one catalyst layer is continuously formed on surface of rotating substrate (10) of cylindrical shape or column shape. Carbon fibers (204) are assembled on the formed catalyst layers, in order to form carbon nanofiber aggregate (B). The formed carbon nanofiber aggregate is collected from the substrate, and surface of the substrate is cleaned.    USE - Manufacture of carbon nanofiber aggregate used for manufacturing conductor wire (claimed). Uses include but are not limited to transparent electrode, semiconductor thin film, lithium-ion battery electrode material, fuel cell electrode material, electrode material for electric double layer capacitor, metal- air battery electrode material and filler material of composite material.    ADVANTAGE - The method enables manufacture of carbon nanofiber aggregate capable of forming long conductor wire, without enlarging the manufacturing apparatus.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) manufacturing apparatus of carbon nanofiber aggregate, which is provided with rotating substrate of cylindrical shape or column shape, catalyst layer formation portion which forms catalyst layers on the surface of the substrate, carbon nanofiber aggregate formation portion (60) which forms the carbon nanofiber aggregate, collection portion which collects the carbon nanofiber aggregate from substrate, and cleaning portion which cleanses the surface of the substrate;    (2) manufacture of conductor wire (62), which involves continuously-forming catalyst layers on surface of rotating substrate, forming carbon nanofiber aggregate, collecting carbon nanofiber aggregate as conductor wire by withdrawing nanofibers, and cleaning the substrate; and    (3) manufacturing apparatus of the conductor wire.    DESCRIPTION OF DRAWING(S) - The drawing shows a top view of the manufacturing apparatus of the conductor wire.    Substrate (10)    Carbon nanofiber aggregate formation portion (60)    Conductor wire (62)    Guide portion (202)    Regulation portion (203)    Carbon nanofibers (204)    Carbon nanofiber aggregate (B)