PURPOSE: To efficiently feed electricity without increasing rotational loads on the members and improve durability of a joint in a rotary feeder joint for connecting together feeding paths provided respectively in two members relatively rotating.

CONSTITUTION: To one of the members relatively rotating, a conductor 7 which constitutes a feeding path in one member side and is concentric with the rotation axis of this member is fixed. A pair of cylinders 51 are provided to the other members so as to be positioned in the both sides in the diametrical direction of the conductor and a pair of contact members 50 for contacting with/ separating from the both sides in the diametrical direction of the conductor are provided to the conductor 7 by action of these both cylinders. A pair of taps 54 connected to feeding paths provided to the other members are provided to the other members so as to be positioned in the both sides in the diametrical direction which crosses the diametrical direction of the conductor 7 at right angles and the both ends of respective contact members 50 are connected to the both taps 54 via a pair of flexible conductors 55.