An electrolytic solution for a lithium battery includes a lithium salt, an organic solvent; a disultone-based compound represented by Formula 1, and a non-polar unsaturated group-containing cyclic carbonate-based compound: wherein, in Formula 1, A1 to A4 are each independently a substituted or unsubstituted C1-C5 alkylene group, a carbonyl group, or a sulfinyl; n1 to n4 are each independently an integer 1 to 3, and when n1 to n4 are each independently two or greater, a respective plurality of any of A1s to A4s are identical to or different from each other. When the lithium battery includes the electrolyte solution, room-temperature and high-temperature lifespan characteristics of the lithium battery may improve.