To provide a more effective magnetic water activator because a simple water treatment device in the present market, which is literally a water purifier easy to install, but has a problem that the distance between magnets facing each other is structurally too large to exhibit a water purification effect by magnetic force.

The magnet configuration is made so that the distance between the magnets facing each other is minimized, thereby exhibiting the water purification effect due to the magnetic force. The magnets are disposed in a drinking water supply pipe so as to face each other, and the distance between the magnets is minimized. The distance between the magnets is adjusted to a gap of 4-8 mm, which leads to a good result. The magnetic water activator for drinking water has an outer magnet and an inner magnet therein, has a structure where the distance between the outer and inner magnets is minimized, and further, has a magnetic ring.