The method for producing trans-rich-1,4-bis(aminomethyl)cyclohexane includes blending 1,4-bis(aminomethyl)cyclohexane with an alkali metal compound and XDA and heating the mixture to isomerize 1,4-bis(aminomethyl)cyclohexane so that the trans isomer content relative to the cis/trans isomers in total is more than 70 mass %, and purifying the isomerized 1,4-bis(aminomethyl)cyclohexane by distillation after the isomerization step. The alkali metal compound is at least one compound selected from the group consisting of alkali metal hydride, alkali metal amide, and alkyl alkali metal. In the isomerization step, 0.01 mol or more and less than 4 mol of XDA is blended relative to 100 mol of 1,4-bis(aminomethyl)cyclohexane, a dimer produced from one molecular of 1,4-bis(aminomethyl)cyclohexane and one molecular of XDA, and a trimer produced from two molecules of 1,4-bis(aminomethyl)cyclohexane and one molecular of XDA are produced, and the dimer content is 5 mass % or more and less than 75 mass % relative to the dimer and trimer in total.