A rolling bearing arrangement comprising a rolling bearing device and a fixed member, the rolling bearing device comprising: a first bearing ring having an inner periphery raceway surface; a second bearing ring having an outer periphery raceway surface; a plurality of rolling elements disposed between the inner periphery raceway surface of the first bearing ring and the outer periphery raceway surface of the second bearing ring; and a lubricant supply unit having at least a tank and a pump that supplies lubricant to at least one of the inner periphery raceway surface of the first bearing ring, the outer periphery raceway surface of the second bearing ring, and the rolling elements, wherein the lubricant supply unit has one or more electrodes (50, 51) to which electric power is supplied from an external power source, and a part of the lubricant supply unit is fixed to one member of the first bearing ring and the second bearing ring, and each of the one or more electrodes (50, 51) is fixed to the one member or the tank of the lubricant supply unit, the tank being stationary relative to the pump, in a state where each of the one or more electrodes (50, 51) is exposed on an outside of the one member or the tank of the lubricant supply unit, characterized in that in the rolling bearing arrangement the one member has a positioning face that is brought into contact with an axial end face of the fixed member to which the one member is fixed, and the one or more electrodes (50, 51) are brought into contact with one or more corresponding external electrodes (60, 61) which are fixed to the fixed member so as to be immovable relative to the fixed member. a first bearing ring having an inner periphery raceway surface; a second bearing ring having an outer periphery raceway surface; a plurality of rolling elements disposed between the inner periphery raceway surface of the first bearing ring and the outer periphery raceway surface of the second bearing ring; and a lubricant supply unit having at least a tank and a pump that supplies lubricant to at least one of the inner periphery raceway surface of the first bearing ring, the outer periphery raceway surface of the second bearing ring, and the rolling elements, wherein the lubricant supply unit has one or more electrodes (50, 51) to which electric power is supplied from an external power source, and a part of the lubricant supply unit is fixed to one member of the first bearing ring and the second bearing ring, and each of the one or more electrodes (50, 51) is fixed to the one member or the tank of the lubricant supply unit, the tank being stationary relative to the pump, in a state where each of the one or more electrodes (50, 51) is exposed on an outside of the one member or the tank of the lubricant supply unit, characterized in that in the rolling bearing arrangement the one member has a positioning face that is brought into contact with an axial end face of the fixed member to which the one member is fixed, and the one or more electrodes (50, 51) are brought into contact with one or more corresponding external electrodes (60, 61) which are fixed to the fixed member so as to be immovable relative to the fixed member.