A three-dimensional shaped article production method for producing a three-dimensional shaped article by stacking layers to form a stacked body, comprising: a constituent layer formation step of forming a constituent layer which corresponds to a constituent region of the three-dimensional shaped article by ejecting a constituent material; a support layer formation step of forming a support layer which is in contact with the constituent layer and supports the constituent layer, by ejecting a support layer forming material; an energy applying step of applying energy to solidify the support layer; repeating the constituent layer formation step, the support layer formation step and the energy applying step a plurality of times to form the stacked body; and a sintering step of sintering the constituent layers in the stacked body, wherein the support layer is configured such that as compared with the volume decrement during the sintering step of an internal space in the constituent layer, the volume decrement during the sintering step of the support layer which supports the constituent layer in the space is larger, characterised in that the support layer is configured such that at least a portion which supports the constituent layer in the space includes: a first support material whose volume change during the sintering step is relatively large compared to the volume change of a second support material during the sintering step, the second support material also being included in the portion which supports the constituent layer in the space, and the second support material whose volume change during the sintering step is relatively small, wherein the support layer includes a region comprising the first support material and a region comprising the second support material, the region comprising the second support material having a relatively small volume change during the sintering step compared to the volume change during the sintering step of the region comprising the first support material. a constituent layer formation step of forming a constituent layer which corresponds to a constituent region of the three-dimensional shaped article by ejecting a constituent material; a support layer formation step of forming a support layer which is in contact with the constituent layer and supports the constituent layer, by ejecting a support layer forming material; an energy applying step of applying energy to solidify the support layer; repeating the constituent layer formation step, the support layer formation step and the energy applying step a plurality of times to form the stacked body; and a sintering step of sintering the constituent layers in the stacked body, wherein the support layer is configured such that as compared with the volume decrement during the sintering step of an internal space in the constituent layer, the volume decrement during the sintering step of the support layer which supports the constituent layer in the space is larger, characterised in that the support layer is configured such that at least a portion which supports the constituent layer in the space includes: a first support material whose volume change during the sintering step is relatively large compared to the volume change of a second support material during the sintering step, the second support material also being included in the portion which supports the constituent layer in the space, and the second support material whose volume change during the sintering step is relatively small, wherein the support layer includes a region comprising the first support material and a region comprising the second support material, the region comprising the second support material having a relatively small volume change during the sintering step compared to the volume change during the sintering step of the region comprising the first support material. a first support material whose volume change during the sintering step is relatively large compared to the volume change of a second support material during the sintering step, the second support material also being included in the portion which supports the constituent layer in the space, and the second support material whose volume change during the sintering step is relatively small, wherein the support layer includes a region comprising the first support material and a region comprising the second support material, the region comprising the second support material having a relatively small volume change during the sintering step compared to the volume change during the sintering step of the region comprising the first support material.