The presented theory of the ozone hole has been developed based on four fundamental physical-chemical factors: (1) the technogenic-freon impact on the ozone layer started in the past century; (2) the presence in the atmosphere of photochemical equilibrium of families of odd constituents at daytime, proved by the calculations and permitted the concentrations of atomic oxygen, chlorine, ozone, and other components in the ozone hole to be calculated correctly without the use of heterogeneous reactions; (3) the action of catalytic cycles in the stratosphere, depleting and generating ozone; (4) a new physical insight into the atmospheric front, including polar stratospheric front (PSF) in Antarctic as an air shield preventing different air masses from turbulent horizontal mixing and forming a dynamically isolated part of the atmosphere inside the polar stratospheric cyclone (PSC) in Antarctic. The theory development is based on readily reproducible calculations, which rest on derived formulas and data of satellite, aircraft, and balloonsonde measurements of concentration of atmospheric minor constituents. The developed theory does not contradict the experimental facts and explains all known features of the ozone hole.