A power transmission shaft structured to be disposed between a first shaft and a second shaft that are a pair of shafts structured to be disposed between a drive source and a drive wheel of a vehicle, the power transmission shaft comprising: a joint section that is disposed to face the first shaft, and includes a first joint and an insertion section, wherein the first joint is disposed between the first shaft and the insertion section in a direction of a rotational axis of the first shaft; and a shaft member that is shaped tubular, and characterized in that the shaft member includes a helical layer part and a hoop layer part (7, 9), and includes a first end and a second end in the direction of the rotational axis of the first shaft, wherein the insertion section is inserted in the shaft member from the first end, wherein: the helical layer part includes a first resin material and a first carbon fiber material higher in tensile strength than the first resin material; the first carbon fiber material is impregnated with the first resin material, and is coiled helically around the rotational axis of the first shaft; the hoop layer part (7, 9) is disposed to overlap with the helical layer part in the direction of the rotational axis of the first shaft, and is disposed inside or outside the helical layer part in a radial direction with respect to the rotational axis of the first shaft; the hoop layer part (7, 9) includes a second resin material and a second carbon fiber material that is lower in tensile strength or tensile elasticity than the first carbon fiber material; and the second carbon fiber material is impregnated with the second resin material, and is coiled circumferentially around the rotational axis of the first shaft. a joint section that is disposed to face the first shaft, and includes a first joint and an insertion section, wherein the first joint is disposed between the first shaft and the insertion section in a direction of a rotational axis of the first shaft; and a shaft member that is shaped tubular, and characterized in that the shaft member includes a helical layer part and a hoop layer part (7, 9), and includes a first end and a second end in the direction of the rotational axis of the first shaft, wherein the insertion section is inserted in the shaft member from the first end, wherein: the helical layer part includes a first resin material and a first carbon fiber material higher in tensile strength than the first resin material; the first carbon fiber material is impregnated with the first resin material, and is coiled helically around the rotational axis of the first shaft; the hoop layer part (7, 9) is disposed to overlap with the helical layer part in the direction of the rotational axis of the first shaft, and is disposed inside or outside the helical layer part in a radial direction with respect to the rotational axis of the first shaft; the hoop layer part (7, 9) includes a second resin material and a second carbon fiber material that is lower in tensile strength or tensile elasticity than the first carbon fiber material; and the second carbon fiber material is impregnated with the second resin material, and is coiled circumferentially around the rotational axis of the first shaft. the helical layer part includes a first resin material and a first carbon fiber material higher in tensile strength than the first resin material; the first carbon fiber material is impregnated with the first resin material, and is coiled helically around the rotational axis of the first shaft; the hoop layer part (7, 9) is disposed to overlap with the helical layer part in the direction of the rotational axis of the first shaft, and is disposed inside or outside the helical layer part in a radial direction with respect to the rotational axis of the first shaft; the hoop layer part (7, 9) includes a second resin material and a second carbon fiber material that is lower in tensile strength or tensile elasticity than the first carbon fiber material; and the second carbon fiber material is impregnated with the second resin material, and is coiled circumferentially around the rotational axis of the first shaft.