A lithium secondary battery is provided with a positive electrode, a negative electrode, a separator and an electrolyte solution, and wherein the positive electrode contains a first active material and a second active material that are capable of absorbing and desorbing lithium respectively. The first active material is only capable of desorbing lithium in a battery reaction with the negative electrode immediately after the assembly of the lithium secondary battery, while the second active material is capable of absorbing lithium in the battery reaction with the negative electrode immediatelyafter the assembly of the lithium secondary battery. The negative electrode contains lithium metal as an active material. The separator has a structure wherein voids are three-dimensionally regularlyarrayed.