A wheel mounting structure comprising a wheel and a wheel hub of a vehicle for fixing the wheel to the wheel hub, wherein: in the wheel hub, a hub axle part; a flange part which is a disk-shaped part extending from the hub axle part in parallel to a surface perpendicular to a rotation axis of the wheel hub and has a fixing surface for fixing the wheel using a plurality of fastening members in a vehicle body outer side of the vehicle; and a spigot joint part which is a cylindrical part having the rotation axis as a central axis and protrudes from the hub axle part toward the vehicle body outer side with respect to the flange part, are provided, and in the wheel, a center hole which allows the spigot joint part to be inserted therethrough is formed at a center of the wheel; and a plurality of bolt holes are formed around the center hole, each of a plurality of the bolt holes allowing each of a plurality of the fastening members to be inserted therethrough; wherein: in the spigot joint part, a first cylindrical outer peripheral surface and a groove are formed, the first cylindrical outer peripheral surface having a central axis coinciding with the rotation axis, and the groove being adjacent to the first cylindrical outer peripheral surface on the vehicle body outer side with respect to the first cylindrical outer peripheral surface; characterized in that: an annular protruding part is formed on an inner peripheral surface of the center hole and in the vicinity of the hub mounting surface side of the wheel, the annular protruding part protruding toward the center of the wheel, in a state where the wheel is fixed to the flange part using a plurality of the fastening members, a fitting part on which the first cylindrical outer peripheral surface is formed and the annular protruding part spigot fit with each other, and in a state where the fixation of the wheel using a plurality of the fastening members is released, the annular protruding part is engaged with the groove. in the wheel hub, a hub axle part; a flange part which is a disk-shaped part extending from the hub axle part in parallel to a surface perpendicular to a rotation axis of the wheel hub and has a fixing surface for fixing the wheel using a plurality of fastening members in a vehicle body outer side of the vehicle; and a spigot joint part which is a cylindrical part having the rotation axis as a central axis and protrudes from the hub axle part toward the vehicle body outer side with respect to the flange part, a hub axle part; a flange part which is a disk-shaped part extending from the hub axle part in parallel to a surface perpendicular to a rotation axis of the wheel hub and has a fixing surface for fixing the wheel using a plurality of fastening members in a vehicle body outer side of the vehicle; and a spigot joint part which is a cylindrical part having the rotation axis as a central axis and protrudes from the hub axle part toward the vehicle body outer side with respect to the flange part, are provided, and in the wheel, a center hole which allows the spigot joint part to be inserted therethrough is formed at a center of the wheel; and a plurality of bolt holes are formed around the center hole, each of a plurality of the bolt holes allowing each of a plurality of the fastening members to be inserted therethrough; wherein: a center hole which allows the spigot joint part to be inserted therethrough is formed at a center of the wheel; and a plurality of bolt holes are formed around the center hole, each of a plurality of the bolt holes allowing each of a plurality of the fastening members to be inserted therethrough; wherein: in the spigot joint part, a first cylindrical outer peripheral surface and a groove are formed, the first cylindrical outer peripheral surface having a central axis coinciding with the rotation axis, and the groove being adjacent to the first cylindrical outer peripheral surface on the vehicle body outer side with respect to the first cylindrical outer peripheral surface; characterized in that: an annular protruding part is formed on an inner peripheral surface of the center hole and in the vicinity of the hub mounting surface side of the wheel, the annular protruding part protruding toward the center of the wheel, in a state where the wheel is fixed to the flange part using a plurality of the fastening members, a fitting part on which the first cylindrical outer peripheral surface is formed and the annular protruding part spigot fit with each other, and in a state where the fixation of the wheel using a plurality of the fastening members is released, the annular protruding part is engaged with the groove. an annular protruding part is formed on an inner peripheral surface of the center hole and in the vicinity of the hub mounting surface side of the wheel, the annular protruding part protruding toward the center of the wheel, in a state where the wheel is fixed to the flange part using a plurality of the fastening members, a fitting part on which the first cylindrical outer peripheral surface is formed and the annular protruding part spigot fit with each other, and in a state where the fixation of the wheel using a plurality of the fastening members is released, the annular protruding part is engaged with the groove.