PURPOSE: To perform mass production of a rotary multicoupler suited for an index table or the like, by providing at least one hollow fixed block and a plurality of hollow rotary blocks rotatably fitted to the periphery of the fixed block, and forming a passage which connects respectively both the blocks.

CONSTITUTION: This rotary multicoupler is formed by fitting a plaurality of hollow rotary blocks 12 through an O ring 14 to the periphery of a fixed block 10 having a hollow part 11, to seal between the adjacent rotary blocks 12 by gland packing 13. In the fixed block 10, the first hole part 18 in the axial line direction and the first groove 19, communicating with the first hole part 18 in its periphery, are provided, and the second groove 20 corresponding to the first groove 19 is provided in the internal periphery of each rotary block 12. In the rotary block 12, the second hole part 21 is formed raclially from the second groove 20, to fit a metal fitting 17 in each hole part 21, and the rotatry blocks 12... are integrally connected by a screw 22a.