PURPOSE: To simplify a piping work and a pipe replacement work by coupling a piping manifold block to a manifold body detachably for connecting and grouping pipes thereto, and forming a port at the block mounting side of the body for connecting pipes.

CONSTITUTION: This manifold device is so constituted that a piping manifold block 2 for connecting and grouping pipes to a manifold body 1 is detachably coupled thereto. In this case, the manifold body 1 and the block 2 are detachably coupled to each other via a sheet of a seal member 4 and setscrews 7 inserted through setscrew insertion sections 5 and setscrew holes 6. Also, setscrews 9 are inserted through the mounting holes 8 of the block 2 from the rear side of pipe connection ports 12 and screwed to the threaded holes 11 of a mounting panel 10, thereby fixing the block 2 to the panel 10. Furthermore, the open ends of the ports 12 are faced to the panel 10 for necessary piping.