A method and device for specifying a portion causing a discrepancy in springback amount between CAE analysis and an actual formed product. The method includes a formed-product-driving-stress-distribution acquisition step of acquiring a driving stress distribution of a press-formed product, an analysis-driving-stress-distribution acquisition step of acquiring a driving stress distribution in springback analysis, a formed-product springback-amount acquisition step of acquiring a springback amount based on the formed product driving stress distribution, a stress-substituted-springback-amount acquisition step of substituting a value of analysis driving stress in a region with a value of formed product driving stress in a corresponding region and acquiring a springback amount based on a stress substituted distribution obtained by the substitution, and a springback-amount-discrepancy-causing-portion specifying step of finding a difference between the formed product springback amount and the stress substituted springback amount and specifying, based on the difference found, a portion causing a discrepancy in springback amount.