Intermolecular electron transfer (ELT) from a series of naphthalene derivatives (NpD) in the higher triplet excited states (T-n) to carbon tetrachloride (CCl4) in Ar-saturated acetonitrile was observed using the two-color two-laser flash photolysis method. The ELT efficiency depended on the driving force of ELT. Since the ELT from the T-n state occurred competitively with the internal conversion (IC, T-n --> T-1) and the triplet energy transfer (ENT), the ELT became apparent only when sufficient free energy change of ELT was attained. On the other hand, ELT from the T-1 state was not observed, although ELT from the T-1 state with sufficiently long lifetime has a slightly exothermic driving force. The fast ELT from the T-1 state and lack of the reactivity of the T-1 state were explained well by the "sticky" dissociative electron-transfer model based on one-electron reductive attachment to CCl4 leading to the C-Cl bond cleavage.