1. A process for producing a three-dimensional model, the process comprising: a step (layer formation step) of forming above a support a layer of a powder material, the layer having a predetermined thickness; a step (cross-sectional shape formation step) of imagewise bonding the powder material layer by a binder according to the cross-sectional shape of a modeled object; and sequentially repeating the above steps; the surface gloss of the three-dimensional model obtained when measured at 20° being 20% or more.