A three-dimensional shaped article production method for producing a three-dimensional shaped article by stacking layers to form a stacked body, comprising: a first layer formation step of forming a first layer on a support by supplying a first composition containing ceramic particles as first particles and a resin as a binder; a solidifying step of solidifying the first layer by applying energy to the first layer; a second layer formation step of forming a second layer composed of a plurality of layers on the first layer by supplying a second composition containing metal particles as second particles and a resin as a binder, wherein the type and amount of the respective resins is adjusted so that the binding force between the metal particles by the resin contained in the second composition is larger than the binding force between the ceramic particles by the resin contained in the first composition; and a separation step of separating the second layer from the support through the first layer, wherein after the separation step, a sintering step of sintering the plurality of layers of the second layer is performed, wherein before the separation step, a separation promotion step of promoting the separation of the second layer from the support is performed, and wherein the decomposition temperature of the binder contained in the first composition is lower than the decomposition temperature of the binder contained in the second composition, and the separation promotion step is a heating step of performing heating at a temperature higher than the decomposition temperature of the binder contained in the first composition and lower than the decomposition temperature of the binder contained in the second composition. a first layer formation step of forming a first layer on a support by supplying a first composition containing ceramic particles as first particles and a resin as a binder; a solidifying step of solidifying the first layer by applying energy to the first layer; a second layer formation step of forming a second layer composed of a plurality of layers on the first layer by supplying a second composition containing metal particles as second particles and a resin as a binder, wherein the type and amount of the respective resins is adjusted so that the binding force between the metal particles by the resin contained in the second composition is larger than the binding force between the ceramic particles by the resin contained in the first composition; and a separation step of separating the second layer from the support through the first layer, wherein after the separation step, a sintering step of sintering the plurality of layers of the second layer is performed, wherein before the separation step, a separation promotion step of promoting the separation of the second layer from the support is performed, and wherein the decomposition temperature of the binder contained in the first composition is lower than the decomposition temperature of the binder contained in the second composition, and the separation promotion step is a heating step of performing heating at a temperature higher than the decomposition temperature of the binder contained in the first composition and lower than the decomposition temperature of the binder contained in the second composition.