A constant velocity universal joint, comprising: an outer joint member having an opening portion at one end thereof; an inner joint member configured to transmit torque while allowing angular displacement with respect to the outer joint member through a torque transmission member; a boot closing the opening portion of the outer joint member, the boot having end portions (61, 62) which are fastened and fixed to a mounting part of the outer joint member and a mounting part of a shaft member extending from the inner joint member; the constant velocity universal joint being characterized by further comprising: an intermediate member (80, 81) configured to reduce abrasion due to friction caused by relative movement between an outer peripheral surface of the shaft member and an inner peripheral surface of the boot, the intermediate member (80, 81) being arranged at a part of the outer peripheral surface of the shaft member where at least the inner peripheral surface of the boot is brought into contact when the shaft member takes an operating angle with respect to the outer joint member, wherein the intermediate member (80, 81) configured to reduce abrasion due to friction caused by relative movement is formed of a cylindrical member configured to cover the outer peripheral surface of the shaft member, wherein an outer peripheral surface of the cylindrical member is cylindrical, and wherein the cylindrical member comprises a sliding bearing, and the inner peripheral surface of the boot slides with respect to the outer peripheral surface of the cylindrical member, and an inner peripheral surface of the cylindrical member slides with respect to the outer peripheral surface of the shaft member. an outer joint member having an opening portion at one end thereof; an inner joint member configured to transmit torque while allowing angular displacement with respect to the outer joint member through a torque transmission member; a boot closing the opening portion of the outer joint member, the boot having end portions (61, 62) which are fastened and fixed to a mounting part of the outer joint member and a mounting part of a shaft member extending from the inner joint member; an intermediate member (80, 81) configured to reduce abrasion due to friction caused by relative movement between an outer peripheral surface of the shaft member and an inner peripheral surface of the boot, the intermediate member (80, 81) being arranged at a part of the outer peripheral surface of the shaft member where at least the inner peripheral surface of the boot is brought into contact when the shaft member takes an operating angle with respect to the outer joint member, wherein the intermediate member (80, 81) configured to reduce abrasion due to friction caused by relative movement is formed of a cylindrical member configured to cover the outer peripheral surface of the shaft member, wherein an outer peripheral surface of the cylindrical member is cylindrical, and wherein the cylindrical member comprises a sliding bearing, and the inner peripheral surface of the boot slides with respect to the outer peripheral surface of the cylindrical member, and an inner peripheral surface of the cylindrical member slides with respect to the outer peripheral surface of the shaft member.