A combination of a wheel hub for a vehicle and a wheel, the combination having a wheel mounting structure configured to mount the wheel to the wheel hub, the wheel hub comprising: a hub axle part; a flange part being a disc-shaped part extending from the hub axle part in parallel to a plane perpendicular to a rotation axis of the wheel hub, the flange part having a fixing surface configured to fix the wheel by using a plurality of hub bolts on a vehicle-body outer side of the vehicle; and a spigot joint part being a part having a cylindrical shape with the rotation axis as a center axis, which is formed to protrude from the hub axle part to the vehicle-body outer side with respect to the flange part, characterized in that the spigot joint part has a cylindrical outer peripheral surface with the rotation axis as a center axis and a cylindrical inner peripheral surface with the rotation axis as a center axis, wherein a collared member being a member having a cylindrical shape, which has a collar part formed to protrude outward in a radial direction of the collared member, is inserted into and fixed to the cylindrical inner peripheral surface from the vehicle-body outer side, and the collar part is formed at a position separated from an end part of the spigot joint part by a predetermined distance when the collared member is inserted into and fixed to the spigot joint part, wherein the wheel has: a center hole formed in a center of the wheel to allow the spigot joint part to be inserted therethrough; a plurality of bolt holes formed around the center hole to allow the plurality of hub bolts to be inserted therethrough; and an annular protruding part formed on a part of an inner peripheral surface of the center hole, which is positioned on a hub mounting surface side of the wheel, to protrude toward the center of the wheel, wherein a fitting part having the cylindrical outer peripheral surface and the annular protruding part are spigot-fitted in a state where the wheel is fixed to the flange part by using the plurality of hub bolts, and wherein the annular protruding part is locked by the collar part in a state where the fixing of the wheel by using the plurality of hub bolts is released. the wheel hub comprising: a hub axle part; a flange part being a disc-shaped part extending from the hub axle part in parallel to a plane perpendicular to a rotation axis of the wheel hub, the flange part having a fixing surface configured to fix the wheel by using a plurality of hub bolts on a vehicle-body outer side of the vehicle; and a spigot joint part being a part having a cylindrical shape with the rotation axis as a center axis, which is formed to protrude from the hub axle part to the vehicle-body outer side with respect to the flange part, a hub axle part; a flange part being a disc-shaped part extending from the hub axle part in parallel to a plane perpendicular to a rotation axis of the wheel hub, the flange part having a fixing surface configured to fix the wheel by using a plurality of hub bolts on a vehicle-body outer side of the vehicle; and a spigot joint part being a part having a cylindrical shape with the rotation axis as a center axis, which is formed to protrude from the hub axle part to the vehicle-body outer side with respect to the flange part, characterized in that the spigot joint part has a cylindrical outer peripheral surface with the rotation axis as a center axis and a cylindrical inner peripheral surface with the rotation axis as a center axis, wherein a collared member being a member having a cylindrical shape, which has a collar part formed to protrude outward in a radial direction of the collared member, is inserted into and fixed to the cylindrical inner peripheral surface from the vehicle-body outer side, and the collar part is formed at a position separated from an end part of the spigot joint part by a predetermined distance when the collared member is inserted into and fixed to the spigot joint part, wherein the wheel has: a center hole formed in a center of the wheel to allow the spigot joint part to be inserted therethrough; a plurality of bolt holes formed around the center hole to allow the plurality of hub bolts to be inserted therethrough; and an annular protruding part formed on a part of an inner peripheral surface of the center hole, which is positioned on a hub mounting surface side of the wheel, to protrude toward the center of the wheel, a center hole formed in a center of the wheel to allow the spigot joint part to be inserted therethrough; a plurality of bolt holes formed around the center hole to allow the plurality of hub bolts to be inserted therethrough; and an annular protruding part formed on a part of an inner peripheral surface of the center hole, which is positioned on a hub mounting surface side of the wheel, to protrude toward the center of the wheel, wherein a fitting part having the cylindrical outer peripheral surface and the annular protruding part are spigot-fitted in a state where the wheel is fixed to the flange part by using the plurality of hub bolts, and wherein the annular protruding part is locked by the collar part in a state where the fixing of the wheel by using the plurality of hub bolts is released.