Shaft-shaped composite member and production method thereof

A production method for a shaft-shaped composite member having a bent part, the production method comprising the steps of:

• placing a plurality of first carbon fiber reinforced resin materials substantially parallel to an axial direction of cavities of a pair of molds, the first carbon fiber reinforced resin materials having an orientation direction substantially parallel to an axial direction of the shaft-shaped composite member;
• forming halved members by pressing the plurality of placed first carbon fiber reinforced resin materials against the cavities;
• winding a second carbon fiber reinforced resin material having a carbon fiber oriented in a direction obliquely intersecting the axial direction of the shaft-shaped composite member on an outer surface of a tube material;
• winding a stress relaxation material having a flexural rigidity lower than a flexural rigidity of the halved members and a torsional rigidity lower than a torsional rigidity of the second carbon fiber reinforced resin material on an outer surface of the second carbon fiber reinforced resin material;
• inserting, into an inner side of the halved members, the tube material with the second carbon fiber reinforced resin material and the stress relaxation material stacked on the outer surface thereof and closing the pair of molds to form a tubular member;
• and
• setting the tubular member by heating the tubular member while applying an internal pressure to the tubular member.