A low hydrogen storage alloy, Co

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This invention provides a low-Co hydrogen absorbing alloy that has a low Co content, possesses excellent service life properties, and is particularly suitable for advanced electric automobiles and hybrid electric automobile applications. The low-Co hydrogen absorbing alloy has a CaCu5-type crystal structure represented by general formula MmNiaMnbAlcCodFee wherein Mm represents a misch metal; 05 type crystal structure are not less than 499.0 pm and not less than 405.0 pm, respectively, and the standard deviation of the a axis length is less than 2.0×10-2pm.