A catheter manufacturing method comprising: positioning a shaft in a cavity of a mold , the shaft being an elongated tubular body configured to be inserted into a living body, the mold comprising a first mold die and a second mold die , the first and second mold dies contacting one another to define a closed space which is the cavity between the first and second mold dies , the shaft extending from a proximal end to a distal end in an axial direction and having a transverse direction perpendicular to the axial direction, the shaft possessing an outer surface and a center at a midpoint of the shaft in the transverse direction; injecting a molding material into the cavity from a gate , said gate being at a position between the proximal end and the distal end of the shaft in the axial direction, the position being offset from the center of the shaft in the transverse direction; and molding a hub onto the shaft by solidifying the injected molding material in the cavity onto the outer surface of the shaft , wherein the mold has a runner directing the molding material to flow from outside the cavity toward the gate , the runner possessing a longitudinal axis, and characterized in that the positioning of the shaft in the cavity of the mold is such that the axial direction of the shaft is askew with respect to the longitudinal axis of the runner , the hub comprises a tubular hub main body and a wing protruding outward from an outer peripheral surface of the hub main body , the cavity comprises a first space for molding the hub main body and a second space for molding the wing , the second space having a longitudinal axis, and the shaft is positioned to be parallel to the longitudinal axis of the second space. positioning a shaft in a cavity of a mold , the shaft being an elongated tubular body configured to be inserted into a living body, the mold comprising a first mold die and a second mold die , the first and second mold dies contacting one another to define a closed space which is the cavity between the first and second mold dies , the shaft extending from a proximal end to a distal end in an axial direction and having a transverse direction perpendicular to the axial direction, the shaft possessing an outer surface and a center at a midpoint of the shaft in the transverse direction; injecting a molding material into the cavity from a gate , said gate being at a position between the proximal end and the distal end of the shaft in the axial direction, the position being offset from the center of the shaft in the transverse direction; and molding a hub onto the shaft by solidifying the injected molding material in the cavity onto the outer surface of the shaft , wherein the mold has a runner directing the molding material to flow from outside the cavity toward the gate , the runner possessing a longitudinal axis, and characterized in that the positioning of the shaft in the cavity of the mold is such that the axial direction of the shaft is askew with respect to the longitudinal axis of the runner , the hub comprises a tubular hub main body and a wing protruding outward from an outer peripheral surface of the hub main body , the cavity comprises a first space for molding the hub main body and a second space for molding the wing , the second space having a longitudinal axis, and the shaft is positioned to be parallel to the longitudinal axis of the second space. <EOS>