The diffusion with simultaneous reaction in cellophane films for 11 vinylsulfonyl reactive dyes was measured at the temperature range between 40 and 60°C by a cylindrical film roll method. Within the pH range examined, the experimental profiles of active and fixed species agreed with the theoretical ones. The pseudofirst-order rate constants, kc, of the reaction with cellulose and the contribution of the hydrolysis in cellulose were evaluated from the experimental profiles. The plots between log kc and pH over the wide range of pH and temperature were linear and had the slope of unity with some exceptions. Under a definite condition, the value of kc for C. I. Reactive Orange 7 was largest and that for Violet 4 was smallest; Black 5 yielding two reactive groups showed a slightly smaller value of kc than that for Orange 7. The contribution of hydrolysis in cellulose was almost negligible under the experimental conditions examined. The activation energies of the reaction with cellulose had the values of 90-140kJ/mol and those of diffusion were in the range from 30 to 50kJ/mol. The former ones were in between those for di- and monochlorotriazinyl reactive dyes, and the latter ones were nearly similar to those for the other reactive dyes.