From the nuclear binding energies given by Wapstra, the pairing energies of identical nucleons have been computed and found to be expressed in the form (22.3 ± 35.5) (2j + 1)/A Mev for the even-even nuclei with mass number A, and pairs in a definite j-shell. By using the computed values of the pairing energy for the even-even and odd A nuclei and assuming the zero range force, we have found the inter-nucleon potential to be Vij = −570r03[1 + (0.6 ± 0.15)σi·σj]δ(ri-rj) Mev, where r0 is the nucleon radius.