The present invention provides a lithium secondary battery which is improved particularly in cycle characteristics. Disclosed is a lithium secondary battery which uses a non-aqueous electrolytic solution obtained by dissolving electrolyte salt in a non-aqueous solvent. The non-aqueous electrolytic solution further contains a pentafluorophenyloxy compound represented by the formula (I), and vinylene carbonate and/or 1,3-propanesultone. ##STR00001## In the formula (I), R.sub.1 is a substituent selected from the group consisting of an alkylcarbonyl group having 2 to 12 carbon atoms, an alkoxycarbonyl group having 2 to 12 carbon atoms, an aryloxycarbonyl group having 7 to 18 carbon atoms, and an alkanesulfonyl group having 1 to 12 carbon atoms. At least one hydrogen atom of the substituent can be substituted with a halogen atom or an aryl group having 6 to 18 carbon atoms.