The present invention provides a composition for a gel polymer electrolyte, a gel polymer electrolyte prepared using the same, and a lithium secondary battery, the composition including: an oligomer represented by Formula 1, an additive, a polymerization initiator, a lithium salt, and a non-aqueous solvent. The additive includes at least one compound selected from the group consisting of an imide-based compound, a compound having a Si—N-based bond, a nitrile-based compound, a phosphate-based compound, and a borate-based compound.