NOVELTY - A prismatic secondary battery (10) includes a terminal component (12) including a connecting portion, which is inserted into a through hole (18a) of an external conduction component (18), and includes a tip (12c) caulked on the external conduction component. The external conduction component includes a convex portion (18e) for suppressing a rotation formed in a position facing the caulked connecting portion of the terminal component, and a portion(s) of the convex portion is covered with the caulked portion.    USE - Prismatic secondary battery used e.g. in electrical vehicle, hybrid electric vehicle and plug-in hybrid electric vehicle.    ADVANTAGE - The terminal component and external conduction component have great bond strength, and rarely rotate with respect to each other. Thus, there is less concern that a conductivity decreases even when the battery is used under an environment including a lot of vibrations.    DETAILED DESCRIPTION - A prismatic secondary battery (10) comprises an electrode assembly including a positive electrode plate and a negative electrode plate; an outer body including an opening, and accommodating the electrode assembly; a sealing body (16) including a through hole (18a), and sealing the opening; an external conduction component (18) including the through hole, and placed outside the sealing body; and a terminal component (12) electrically connected to the positive electrode plate or the negative electrode plate, and passing through the through hole of the sealing body. The terminal component includes a connecting portion, which is inserted into the through hole of the external conduction component, and includes a tip (12c) caulked on the external conduction component. The external conduction component includes a convex portion (18e) for suppressing a rotation formed in a position facing the caulked connecting portion of the terminal component, and a portion(s) of the convex portion is covered with the caulked portion.    DESCRIPTION OF DRAWING(S) - The drawing is an enlarged sectional view of a portion of positive electrode of prismatic nonaqueous electrolyte secondary battery.    Prismatic secondary battery (10)    Terminal component (12)    Tip (12c)    Sealing body (16)    External conduction component (18)    Through hole (18a)    Convex portion (18e)