NOVELTY - An electrochemical device has a laminated exterior film (4) having inner layer (41), an electrochemical element, lead terminal (5,6) and a laminated coating film (7) for lead terminals provided in correspondence with a sealing portion. Outer layer (73) of coating film comprises heat bondable synthetic resin. The sealing portion is formed by melting and heat-sealing element in a state in which lead terminal is interposed through the coating film. The melting point of outer layer in the coating film is less than melting point of inner layer of the exterior film.    USE - Electrochemical device is used in lithium ion secondary battery and electrical double layer capacitor used as power supply for electric vehicle and mobile telephone.    ADVANTAGE - The electrochemical device is easily and reliably manufactured with high quality.    DETAILED DESCRIPTION - An electrochemical device has a laminated exterior film in which inner layer consists of a heat bondable synthetic resin, an electrochemical element accommodated in the exterior film, lead terminal in which internal portion is electrically connected to the electrochemical element, and external portion is drawn outside from the exterior film, and a laminated coating film for lead terminals provided in correspondence with sealing portion. Outer layer of coating film comprises heat bondable synthetic resin having compatibility with inner layer of the exterior film. The sealing portion is formed by melting by heat-sealing in a state in which lead terminal is interposed through the coating film. The melting point of outer layer in the coating film is less than melting point of inner layer of the exterior film. An INDEPENDENT CLAIM is included for manufacture of electrochemical device.    DESCRIPTION OF DRAWING(S) - The drawing shows the sectional view of sealed portion vicinity in lead terminal of battery.    Laminated exterior film (4)    Lead terminals (5,6)    Laminated coating film (7)    Inner layer (41)    Intermediate layer (42)    Outer layer (73)