Provided is an electric double layer capacitor that is able to maintain a discharge capacity retention rate of at least 80% for at least 1000 hours in a constant current-constant voltage continuous discharge test at 3.5 V and 60 DEG C, wherein: the positive electrode contains graphite as a positive electrode active material; a current collector on the positive electrode side is made of an aluminummaterial; and the aluminum material is coated with an amorphous carbon film having a thickness of 60-300 nm.