The multipole structure of the effective proton‐neutron interaction was analyzed in the odd‐odd In nuclei by fitting a dipole plus quadrupole interaction to the splitting of 11 multiplets of110−116In. It was found that the quadrupole‐quadrupole interaction is about twice as strong as in the doubly magic region. The additional quadrupole‐quadrupole interaction strength found is in agreement with the predictions of the particle‐vibration theory.1