A lithium secondary battery includes a positive electrode which can occlude and discharge lithium ion, a negative electrode which can occlude and discharge lithium ion, a separator which is disposed between the positive electrode and the negative electrode, and an electrolyte. In order to suppress a deterioration for a period of high temperature storage at 50° C. or more, the electrolyte includes a compound within whose molecule a plurality of polymerizable functional groups are included.The electrolyte can include a compound represented by the formula 3: wherein each of Z1 and Z2 represents a polymerizable functional group including any one selected from the group consisting of allyl group, methallyl group, vinyl group, acryl group and methacryl group.