Battery and sealing member unit

One battery to be disclosed, includes an exterior member accommodating the electrode body and the lead, and a gasket, and an external terminal, and a restraining member. Package member includes a terminal connecting portion thickness is 0.3mm or less. The terminal connecting portion, a through hole having a rising portion. The gasket has an axial portion of the hollow inserted into the rising portion. External terminal is provided with a terminal shank, this pin shaft portion includes a reduced diameter portion. Restraining member is restrained via a shaft portion of reduced diameter portion and the gasket of the rising portion at least a portion of the reduced diameter portion of the pin shank. Inclination angle of the rising portion is larger than the inclination angle of the terminal shaft.