The channel deformation of gravel-bed river with vegetation zone was investigated in the present study. The channel is assumed to be constituted by a gravel-silt mixture. In order to simulate such a phenomenon, the erosion rate of silt from gravel bed surface is the important factor to be considered. The formulation by Ashida and Fujita (1986) was applied here in the numerical model. Numerical computation was conducted by considering the effect of silt erosion and deposition on the channel deformation. As a result of this, it was confirmed that the depositional configuration like a terrace formed just inside the vegetation zone, which was mentioned by Fujita et al.(1996).