The Dalitz decay of the K-L meson is investigated in consistency with
the approximate \Delta I\ = 1/2 rule in the K --> pi pi decays, the K-
L-K-S mass difference, and the K-L --> gamma gamma decay. The form fac
tor for the Dalitz decay is compared with the existing data from K-L -
-> gamma e(+)e(-) and gamma mu(+)mu(-). It is demonstrated that vector
meson poles can play an important role.