Abstract: An ion exchange membrane, a method for producing an ion exchange membrane, and an electrolyzer that enable a reduction in the electrolytic voltage when subjected to electrolysis are provided which have small influence of impurities in the electrolyte on electrolysis performance, and exert stable electrolysis performance. An ion exchange membrane includes a membrane main body containing a fluorine-containing polymer having an ion exchange group; and a coating layer arranged on at least one face of the membrane main body. The coating layer includes inorganic particles and a binder, a mass ratio of the binder to the total mass of the inorganic particles and the binder in the coating layer is 0.3 or more and 0.9 or less, and a coverage of the membrane main body with the coating layer is 50% or more.