A computer-implemented springback amount discrepancy factor portion identification method for identifying a portion of a shape of a press-formed product, which is formed by press forming an actual panel, the portion being a factor causing a discrepancy between an amount of springback occurred in the press-formed product and an amount of springback obtained by a springback analysis that is performed on an analysis model having a shape the same as the shape of the press-formed product, the method comprising: a formed product driving stress distribution acquisition step of generating a press-formed product model by using three-dimensional shape measurement data that is obtained by measuring a surface shape of the press-formed product after the press-formed product has been released from a die, performing a mechanical analysis in a state where the press-formed product model is sandwiched by a die model to a forming bottom dead center, and acquiring a stress distribution at the forming bottom dead center as a driving stress distribution contributed to the springback in the press-formed product; an analysis driving stress distribution acquisition step of acquiring a stress distribution at the bottom dead center in the springback analysis and a residual stress distribution after the press-formed product has been released from the die and acquiring a difference between the stress distribution at the bottom dead center and the residual stress distribution after the press-formed product has been released from the die as a driving stress distribution in the springback analysis; a stress difference distribution setting step of obtaining a stress difference distribution from a difference between an analysis driving stress distribution acquired in the analysis driving stress distribution acquisition step and a formed product driving stress distribution acquired in the formed product driving stress distribution acquisition step and setting the stress difference distribution to the shape of the formed product at the bottom dead center in the springback analysis; a stress difference springback amount acquisition step of acquiring a springback amount by performing a springback analysis based on the set stress difference distribution; a changed stress difference springback amount acquisition step of changing a stress difference value in a region of the stress difference distribution set in the stress difference distribution setting step and acquiring a springback amount by performing a springback analysis based on the changed stress difference distribution; and a springback amount discrepancy factor portion identification step of identifying a portion of a shape of a formed product, the portion being a factor causing a discrepancy in springback amount between the press-formed product and the springback analysis, by comparing the springback amount acquired in the changed stress difference springback amount acquisition step and the springback amount acquired in the stress difference springback amount acquisition step. a formed product driving stress distribution acquisition step of generating a press-formed product model by using three-dimensional shape measurement data that is obtained by measuring a surface shape of the press-formed product after the press-formed product has been released from a die, performing a mechanical analysis in a state where the press-formed product model is sandwiched by a die model to a forming bottom dead center, and acquiring a stress distribution at the forming bottom dead center as a driving stress distribution contributed to the springback in the press-formed product; an analysis driving stress distribution acquisition step of acquiring a stress distribution at the bottom dead center in the springback analysis and a residual stress distribution after the press-formed product has been released from the die and acquiring a difference between the stress distribution at the bottom dead center and the residual stress distribution after the press-formed product has been released from the die as a driving stress distribution in the springback analysis; a stress difference distribution setting step of obtaining a stress difference distribution from a difference between an analysis driving stress distribution acquired in the analysis driving stress distribution acquisition step and a formed product driving stress distribution acquired in the formed product driving stress distribution acquisition step and setting the stress difference distribution to the shape of the formed product at the bottom dead center in the springback analysis; a stress difference springback amount acquisition step of acquiring a springback amount by performing a springback analysis based on the set stress difference distribution; a changed stress difference springback amount acquisition step of changing a stress difference value in a region of the stress difference distribution set in the stress difference distribution setting step and acquiring a springback amount by performing a springback analysis based on the changed stress difference distribution; and a springback amount discrepancy factor portion identification step of identifying a portion of a shape of a formed product, the portion being a factor causing a discrepancy in springback amount between the press-formed product and the springback analysis, by comparing the springback amount acquired in the changed stress difference springback amount acquisition step and the springback amount acquired in the stress difference springback amount acquisition step.