NOVELTY - The nickel-hydrogen alkaline storage battery (10) comprises an electrode group, an alkaline electrolyte, and an outer can containing the electrode group and the alkaline electrolyte. The electrode group is fabricated by rolling a positive electrode using nickel hydroxide as a main positive electrode active material and a hydrogen storage alloy negative electrode (11) using a hydrogen storage alloy as a negative electrode active material into a spiral form with a separator (13), which keeps the two electrodes apart.    USE - The nickel-hydrogen alkaline storage battery is useful as an electric current source for hybrid electric vehicles and pure electric vehicles.    ADVANTAGE - The nickel-hydrogen alkaline storage battery has long-term durability performance such as excellent output characteristics and improved self-discharge characteristics.    DETAILED DESCRIPTION - The nickel-hydrogen alkaline storage battery (10) comprises an electrode group, an alkaline electrolyte, and an outer can containing the electrode group and the alkaline electrolyte. The electrode group is fabricated by rolling a positive electrode using nickel hydroxide as a main positive electrode active material and a hydrogen storage alloy negative electrode (11) using a hydrogen storage alloy as a negative electrode active material into a spiral form with a separator (13), which keeps the two electrodes apart. The hydrogen storage alloy negative electrode is formed in a strip form including a long axis and a short axis in which a ratio (A/B) of a length A (cm) of the long axis to a length B (cm) of the short axis is greater than or equal to 20 and less than or equal to 30 (20 less than or equal to A/B less than or equal to 30) and a ratio (X/Y) of an electrolyte volume X (g) retained in the hydrogen storage alloy negative electrode to an electrolyte volume Y (g) retained in the separator is greater than or equal to 0.8 and less than or equal to 1.1 (0.8 less than or equal to X/Y less than or equal to 1.1). The hydrogen storage alloy negative electrode includes a hydrogen storage alloy used as a negative electrode active material, an adhesive paste made of a thermoplastic elastomer, and a carbon conductor, where a ratio Z (m2/cm3) of a of the negative electrode (m2) to a unit volume (1 cm3) of a negative electrode active material is greater than or equal to 31 m2/cm3 and less than or equal to 117 m2/cm3 (31 m2/cm3 less than or equal to Z less than or equal to 117 m2/cm3). The hydrogen storage alloy includes a component A composed of elements including a rare earth element and magnesium, and a component B composed of elements including a nickel, and has a primary alloy phase of an A5B19 type structure.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic sectional view of an alkaline storage battery.    Alkaline storage battery (10)    Hydrogen storage alloy negative electrode (11)    Nickel positive electrode (12)    Separator (13)    Negative electrode current collecting body. (14)