A railcar bogie includes: a cross beam configured to support a carbody of a railcar; a pair of front and rear axles between which the cross beam is located and which are respectively arranged in front of and behind the cross beam in a railcar longitudinal direction so as to extend in a railcar width direction; bearings respectively provided at both railcar width direction sides of the axles and configured to rotatably support the axles; axle box main bodies configured to respectively accommodate the bearings; plate springs extending in the railcar longitudinal direction to respectively support both railcar width direction end portions of the cross beam, both longitudinal direction end portions of the plate springs being respectively arranged above the axle box main bodies to be respectively supported by the axle box main bodies.