Cosmology of dilatonic brane world

We study cosmological solutions in the dilatonic brane world models. The ef fective four-dimensional equations on the brane are analyzed for the models with one positive tension brane and two branes with tensions of opposite s igns. Just as in the non-dilatonic brane case, the conventional Friedmann e quations of the four-dimensional universe are reproduced to the leading ord er in matter energy density for the model with one brane and the introducti on of a radion potential is required in order to reproduce the Friedmann eq uations with the correct sign for the model with two branes.