<p>The invention achieves an ion generator and air purifier that are provided with a highly safe ion transport path that is capable of discharging a high concentration of ions into an indoor space. In an ion generator (10) provided with an ion generating element (1) that generates ions, and provided with an ion transport path (6) that has the ion generating element (1) on a wall surface thereof and discharges generated ions from a discharge opening (8), the ion transport path (6) is characterized by: having a first dielectric layer (4) on the inner side thereof, and a metal layer (5) on the outer side of said dielectric layer; and applying a specified voltage to the metal layer (5) in accordance with the thickness of the first dielectric layer (4).</p>
