NOVELTY - Producing alkaline primary battery involves inserting cylindrical separator (4) with bottom into hollow of positive electrode (2) inside cylindrical battery case (1), injecting electrolyte into separator to impregnate positive electrode and the separator with electrolyte; filling gelled negative electrode (3) into separator; inserting negative electrode current collector into negative electrode; and sealing an opening of battery case, and immerse lower end of cylindrical portion of separator in electrolyte remaining in separator without being absorbed by positive electrode and separator.    USE - For producing an alkaline primary battery (claimed), used as the power source for electronic devices such as portable appliances and information devices.    ADVANTAGE - The alkaline dry battery has high reliability; and prevents the lower end part of the cylindrical portion of the separator from bending inward in a reliable manner.    DETAILED DESCRIPTION - Producing an alkaline primary battery involves inserting at least one hollow cylindrical positive electrode (2) pellet into cylindrical battery case (1) with bottom and pressing the positive electrode pellet to form cylindrical positive electrode having a hollow and adhering closely to an inner face of the battery case; inserting a cylindrical separator (4) with bottom into the hollow of positive electrode inside battery case, where the separator including a wound cylindrical portion; and bottom portion that is U-shaped in cross-section, where bottom portion covering an opening of the cylindrical portion at a lower end of the cylindrical portion and having an upstanding portion that extends along a lower outer face of the cylindrical portion; injecting an electrolyte into the separator to impregnate the positive electrode and the separator with the electrolyte; filling a gelled negative electrode (3) into the separator; inserting a negative electrode current collector into the negative electrode; and sealing an opening of the battery case, where the amount of electrolyte injected into the separator is sufficient to impregnate positive electrode and the separator and immerse a lower end of the cylindrical portion of the separator in the electrolyte remaining in the separator without being absorbed by the positive electrode and the separator, thus bringing the lower end of the cylindrical portion into contact with the upstanding portion of the bottom portion.    DESCRIPTION OF DRAWING(S) - The figure shows a partially sectional front view of an example of an alkaline primary battery.    Cylindrical battery case (1)    Hollow cylindrical positive electrode (2)    Gelled negative electrode (3)    Cylindrical separator (4)    Gasket (5)    Negative electrode current collector (6)    Negative terminal plate (7)    Outer label (8)    Seal unit (9)    Depression (10)    Cylindrical protrusion (11)