The present invention relates to a lithium secondary battery comprising: a non-aqueous electrolyte solution containing a lithium salt, an organic solvent, a first additive represented by formula 1, and a second additive represented by formula 2; a positive electrode including a positive electrode active material of a lithium composite transition metal oxide containing nickel, cobalt, and manganese; a negative electrode including a negative electrode active material; and a separator interposed between the positive electrode and the negative electrode.
