In a three-dimensional molding method according to an embodiment of the present invention, the following steps are performed repeatedly in order to produce a three-dimensional molded object: a step inwhich material particles coated with a binder are coated with a reaction solution that either dissolves the binder or causes a binding reaction with the binder; and a step in which the material particles are layered. As a result, it is possible to improve the density and the strength of a three-dimensional molded object and to obtain a homogeneous three-dimensional molded object.