BEARING DEVICE FOR AXLE

An axle bearing system is provided in which even in the event that a sufficient space is not present between a bearing portion in which a fluorine seal is used in a seal portion and a hub shaft, it is possible to establish an electric conduction between an outer ring and an inner ring in an ensured fashion. There is provided an axle bearing system having a bearing portion which includes an inner ring 11, an outer ring 12 and a plurality of rolling elements 13 which are interposed between the inner ring 11 and the outer ring 12 and which is installed on a hub shaft 2 with seal portions 20a, 20b which are each formed by a slinger, a core metal and a non-conductive seal provided therebetween mounted in annular opening portions formed between the inner ring 11 and the outer ring 12, wherein a conductive body 24 is provided in the seal portion 20b so as to provide an electrical conducting state between the outer ring 12 and the inner ring 11.