A lithium secondary battery, comprising: a cathode; an anode; and a non-aqueous electrolyte having lithium ion conductivity, wherein a lithium metal is precipitated on a surface of the anode during charge of the lithium secondary battery; the lithium metal is dissolved from the surface of the anode in the non-aqueous electrolyte during discharge of the lithium secondary battery; the non-aqueous electrolyte comprises a solvent and a lithium salt, wherein the solvent comprises an ether as a main solvent and wherein a volume ratio of the ether to the solvent is not less than 60%; wherein the ether is a chain ether or a cyclic ether, wherein the chain ether is represented by a chemical formula R 1 -O-R 3 -O-R 2, wherein R 1 is an alkyl group having a carbon number of not less than 1 and not more than 4; R 2 is an alkyl group having a carbon number of not less than 1 and not more than 4; and R 3 is an alkylene group having a carbon number of not less than 2 and not more than 4, wherein the cyclic ether is selected from the group consisting of 1,3-dioxolane, 4-methyl-1,3-dioxolane, tetrahydrofuran, 2-methyltetrahydrofuran, propylene oxide, 1,2-butylene oxide, 1,3-dioxane, 1,4-dioxane, 1,3,5-trioxane, furan, 2-methylfuran, 1,8-cineol, and a crown ether, the lithium salt includes a first lithium salt and a second lithium salt; the second lithium salt is different from the first lithium salt; the first lithium salt is comprised of a lithium ion and an ate complex anion, wherein the first lithium salt is represented by a chemical formula LiBX 4 or LiPX 6, where X is a fluorine atom or an oxygen-containing ligand, wherein the oxygen-containing ligand is represented by the chemical formula - OOC-COO -; the second lithium salt is comprised of a lithium ion and an anion of imide, wherein the imide is represented by the formula N(SO 2 C m F 2m+1)(SO 2 C n F 2n+1) -, where m and n are, each independently, an integer of from 0 to 3; a sum of concentration of the first lithium salt and the second lithium salt which are contained in the non-aqueous electrolyte is not less than 3.0 mol/L; wherein the first lithium salt comprised in the non-aqueous electrolyte has a concentration of not less than 0.01 mol/L and not more than 2 mol/L; and wherein the second lithium salt comprised in the non-aqueous electrolyte has a concentration of not less than 1.5 mol/L. a cathode; an anode; and a non-aqueous electrolyte having lithium ion conductivity, wherein a lithium metal is precipitated on a surface of the anode during charge of the lithium secondary battery; the lithium metal is dissolved from the surface of the anode in the non-aqueous electrolyte during discharge of the lithium secondary battery; the non-aqueous electrolyte comprises a solvent and a lithium salt, wherein the solvent comprises an ether as a main solvent and wherein a volume ratio of the ether to the solvent is not less than 60%; wherein the ether is a chain ether or a cyclic ether, wherein the chain ether is represented by a chemical formula R 1 -O-R 3 -O-R 2, wherein R 1 is an alkyl group having a carbon number of not less than 1 and not more than 4; R 2 is an alkyl group having a carbon number of not less than 1 and not more than 4; and R 3 is an alkylene group having a carbon number of not less than 2 and not more than 4, wherein the cyclic ether is selected from the group consisting of 1,3-dioxolane, 4-methyl-1,3-dioxolane, tetrahydrofuran, 2-methyltetrahydrofuran, propylene oxide, 1,2-butylene oxide, 1,3-dioxane, 1,4-dioxane, 1,3,5-trioxane, furan, 2-methylfuran, 1,8-cineol, and a crown ether, the lithium salt includes a first lithium salt and a second lithium salt; the second lithium salt is different from the first lithium salt; the first lithium salt is comprised of a lithium ion and an ate complex anion, wherein the first lithium salt is represented by a chemical formula LiBX 4 or LiPX 6, where X is a fluorine atom or an oxygen-containing ligand, wherein the oxygen-containing ligand is represented by the chemical formula - OOC-COO -; the second lithium salt is comprised of a lithium ion and an anion of imide, wherein the imide is represented by the formula N(SO 2 C m F 2m+1)(SO 2 C n F 2n+1) -, where m and n are, each independently, an integer of from 0 to 3; a sum of concentration of the first lithium salt and the second lithium salt which are contained in the non-aqueous electrolyte is not less than 3.0 mol/L; wherein the first lithium salt comprised in the non-aqueous electrolyte has a concentration of not less than 0.01 mol/L and not more than 2 mol/L; and wherein the second lithium salt comprised in the non-aqueous electrolyte has a concentration of not less than 1.5 mol/L.