Burning rate of coke deposited on zeolite catalyst is evaluated under conditions of chemical reaction control and compared with experimental data reported previously by other investigators. The rate equation obtained in this paper is first order with respect to both coke concentration and oxygen partial pressure. Its activation energy is 26.2 kcal/g-mol, slightly lower than those of other works. Burning rate is approximately independent of the source of coke, but is affected by a certain kind of cation in zeolite.