A thrust roller bearing (720, 820, 1320, 1420, 2120) comprising: a plurality of rollers which are radially arranged; a retainer having a pocket which is formed in a circular ring shape as a whole and rollingly retains the plurality of rollers; and at least one raceway ring (724, 824, 1324, 1424, 2124) which is provided with a race surface on which the plurality of rollers roll, wherein the raceway ring (724, 824, 1324, 1424, 2124) includes an iron raceway ring (725, 825, 1325, 1425, 2129) and a resin raceway ring (726, 826, 1326, 1426, 2131) having electrically insulating properties, the iron raceway ring (725, 825, 1325, 1425, 2129) is formed of a metal disk with a hole and includes a circular ring-shaped annular plate portion (725a, 825a, 1325a, 1425a, 2129a) provided with the race surface, the resin raceway ring (726, 826, 1326, 1426, 2131) includes an annular plate portion (726c, 826c, 1326c, 1426c, 2131a) made by resin, the iron raceway ring (725, 825, 1325, 1425, 2129) and the resin raceway ring (726, 826, 1326, 1426, 2131) are integrally assembled, and the iron raceway ring (725, 825, 1325, 1425, 2129) is formed of steel obtained by subjecting case-hardening steel such as an SCM material to carbonitriding treatment or steel obtained by quenching SK85 according to JIS G 4401 which is carbon tool steel, and the resin raceway ring (726, 826, 1326, 1426, 2131) is formed of a resin insulating material selected from polyphenylene sulfide resin, 6-6 nylon, or 4-6 nylon, characterized in that the annular plate portion (725a, 825a, 1325a, 1425a, 2129a) of the iron raceway ring (725, 825, 1325, 1425, 2129) is formed with a circumferential cutout (725e, 825e, 1325e, 1425e, 2129d) in the circumferential direction on a peripheral edge of the annular plate portion (725a, 825a, 1325a, 1425a, 2129a), the resin raceway ring (726, 826, 1326, 1426, 2131) includes a locking claw (726b, 826b, 1326b, 1426b, 2131c), protruding from a peripheral edge of the annular plate portion (726c, 826c, 1326c, 1426c, 2131a) made by resin toward the race surface, formed in the circumferential direction, and the iron raceway ring (725, 825, 1325, 1425, 2129) and the resin raceway ring (726, 826, 1326, 1426, 2131) are integrally assembled by being engaged with each other by locking the locking claw (726b, 826b, 1326b, 1426b, 2131c) of the resin raceway ring with the circumferential cutout (725e, 825e, 1325e, 1425e, 2129d) of the iron raceway ring (725, 825, 1325, 1425, 2129). a plurality of rollers which are radially arranged; a retainer having a pocket which is formed in a circular ring shape as a whole and rollingly retains the plurality of rollers; and at least one raceway ring (724, 824, 1324, 1424, 2124) which is provided with a race surface on which the plurality of rollers roll, wherein the raceway ring (724, 824, 1324, 1424, 2124) includes an iron raceway ring (725, 825, 1325, 1425, 2129) and a resin raceway ring (726, 826, 1326, 1426, 2131) having electrically insulating properties, the iron raceway ring (725, 825, 1325, 1425, 2129) is formed of a metal disk with a hole and includes a circular ring-shaped annular plate portion (725a, 825a, 1325a, 1425a, 2129a) provided with the race surface, the resin raceway ring (726, 826, 1326, 1426, 2131) includes an annular plate portion (726c, 826c, 1326c, 1426c, 2131a) made by resin, the iron raceway ring (725, 825, 1325, 1425, 2129) and the resin raceway ring (726, 826, 1326, 1426, 2131) are integrally assembled, and the iron raceway ring (725, 825, 1325, 1425, 2129) is formed of steel obtained by subjecting case-hardening steel such as an SCM material to carbonitriding treatment or steel obtained by quenching SK85 according to JIS G 4401 which is carbon tool steel, and the resin raceway ring (726, 826, 1326, 1426, 2131) is formed of a resin insulating material selected from polyphenylene sulfide resin, 6-6 nylon, or 4-6 nylon, characterized in that the annular plate portion (725a, 825a, 1325a, 1425a, 2129a) of the iron raceway ring (725, 825, 1325, 1425, 2129) is formed with a circumferential cutout (725e, 825e, 1325e, 1425e, 2129d) in the circumferential direction on a peripheral edge of the annular plate portion (725a, 825a, 1325a, 1425a, 2129a), the resin raceway ring (726, 826, 1326, 1426, 2131) includes a locking claw (726b, 826b, 1326b, 1426b, 2131c), protruding from a peripheral edge of the annular plate portion (726c, 826c, 1326c, 1426c, 2131a) made by resin toward the race surface, formed in the circumferential direction, and the iron raceway ring (725, 825, 1325, 1425, 2129) and the resin raceway ring (726, 826, 1326, 1426, 2131) are integrally assembled by being engaged with each other by locking the locking claw (726b, 826b, 1326b, 1426b, 2131c) of the resin raceway ring with the circumferential cutout (725e, 825e, 1325e, 1425e, 2129d) of the iron raceway ring (725, 825, 1325, 1425, 2129).