PROBLEM TO BE SOLVED: To reduce the number of high-frequency power source, reduce costs and to save maintenance and inspection labour by feeding electricity from a base track to each of moving tracks though a coil for the tip end of the base track and a coil for a base end of each of the moving tracks. SOLUTION: At the tip end of a primary conductor 14 along a base track 2, a connection coil 30 is provided, and at base ends of primary conductors 14b and 14c along a first and a second moving tracks 2 and 3, connection coils 31 and 32 are provided opposed to the connection coil 30. A common high-frequency power source 33 is connected to a base end of the primary conductor 14a, and a high-frequency power source 19 for branch track is connected to the tip end of primary conductors 14b and 14e along each of branch tracks 5 and 6. The primary conductors 14a and 14b or 14c, or the primary conductors 14d and 14e form reciprocal power-feeding circuits, respectively. When a high-frequency current is flown from common high-frequency power source 33 through the primary conductor 14a to the connection coil 30 to generate a magnetic field, the electric current flows through the opposed connection coil 31 to the primary conductor 14b, or through the connection coil 12 to the primary conductor 14c to enable electricity feeding.
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