The invention relates to a non-aqueous electrolyte secondary battery (1) which has a positive electrode (2), a negative electrode (3), a non-aqueous electrolyte solution containing a gas-forming additive, and a current interrupt device (5). The current interrupt device is configured to interrupt a current of the non-aqueous electrolyte secondary battery in response to a rise of internal pressure in the non-aqueous electrolyte secondary battery. The gas-foiming additive includes cyclohexylbenzene and at least one terphenyl selected from the group consisting of o-terphenyl and m-terphenyl.