Magnetic field forming device for active water and fluid treatment apparatus using the same

An object of the present invention is to provide a magnetic field forming device for active water capable of uniformly forming a high magnetic field free from any unevenness in its intensity, activating a fluid regardless of the orientation of magnetic polarity of the magnets, bringing about excellent assembling efficiency not requiring assembling while checking the orientation of the magnets, being manufactured at a high product yield ratio without occurrence of defective products resulting from a difference in the orientation of the magnets, remarkably easily taking out the magnets without use of any exclusive special tool, and removing rust and stains adhered to the magnets by wiping off the magnets one by one, the maintenance efficiency of which is excellent. The magnetic field forming device for active water in which a flow path of a fluid is formed in a through hole, and the same magnetic field forming device includes a rod-shaped magnet 2 disposed with predetermined spacing from the inner wall of the through hole and having a fluid flow path formed between the inner wall and the side 3; a guide member 5 adhered to and fixed to the end part of the magnet 2, which is inserted into the interior of the through hole; and a communication portion 8 formed at the guide member 5, which communicates with the fluid flow path.