Power transmitting shaft

A power transmitting shaft located between a first shaft and a second shaft as a pair of axial members provided between a driving source and driving wheels of a vehicle, the axial members each having an inserting end portion and a fitting groove portion, the power transmitting shaft comprising:

• a shaft member provided between the first shaft and the second shaft;
• a joint member provided between the shaft member and the axial member in a direction of a rotation axis of the axial member and having a joint portion and a tubular portion, wherein
• the joint portion is a flexible joint provided at the shaft member, and
• the tubular portion has a tubular portion body, a retaining ring inserting portion and a retaining ring fitting portion, wherein
• the tubular portion body is provided at the joint portion and has a tubular shape into which the inserting end portion of the axial member can be inserted,
• the retaining ring inserting portion is provided at the tubular portion body and penetrates the tubular portion body in a radial direction crossing the rotation axis of the axial member, and
• the retaining ring fitting portion is provided at the tubular portion body, opens toward an inner side of the tubular portion body in the radial direction crossing the rotation axis of the axial member and has a shape that extends in a circumferential direction of the rotation axis of the axial member;
• and
• a retaining ring made of elastic material, wherein
• the retaining ring can be inserted into the tubular portion body from the retaining ring inserting portion, and
• the retaining ring stops a movement of the joint member relative to the axial member in the direction of the rotation axis of the axial member by fitting of the retaining ring into both of the fitting groove portion of the axial member and the retaining ring fitting portion with the inserting end portion being inserted into the tubular portion.