NOVELTY - Selective recovery of rare earth metal, nickel, cobalt, manganese and iron contained in nickel-metal hydride battery, comprises e.g.: (a) grinding accumulator; (b) removing potassium contained in crushed accumulator by washing with water; (c) separating the aqueous phase containing the potassium by filtration and recovering a solid phase and the aqueous phase; (d) grinding resultant solid phase; and (e) separating crushed parts of solid phase having a largest dimension less than 1 mm and recovering solid phase having a largest dimension less than 1 mm, where this phase is called black mass.    USE - The method is useful for selective recovery of rare earth metal, nickel, cobalt, manganese and iron contained in nickel-metal hydride battery.    ADVANTAGE - The method provides selective recovery of rare earth metal, nickel, cobalt, manganese and iron.    DETAILED DESCRIPTION - Selective recovery of rare earth metal, nickel, cobalt, manganese and iron contained in nickel-metal hydride battery, comprises: (a) grinding the accumulator; (b) removing the potassium contained in the crushed accumulator by washing with water; (c) separating the aqueous phase containing the potassium by filtration and recovering a solid phase and the aqueous phase; (d) grinding the resultant solid phase; (e) separating the crushed parts of the solid phase having a largest dimension less than 1 mm and recovering solid phase having a largest dimension less than 1 mm, where this phase is called black mass; (f) dissolving the black mass in acid; (g) removing residual carbon particles and/or polymers; (h) oxidation of iron content in the +2 oxidation state obtained after steps (f) and (g) of iron of +3 oxidation state; (i) oxidation state +3 iron precipitation by adjusting the pH of the solution to 3.5; (j) separating and washing the precipitate obtained in step (i); (k) adjusting the pH of the solution obtained after step (j) to 1; (l) adding sodium chloride in the solution obtained in step (k) to provide a precipitate of manganese dioxide; (m) separating and washing of the precipitate of manganese dioxide; (n) adjusting the pH of the solution obtained after step (m) to 3; (o) adding sodium chloride in the solution obtained in step (n) to form precipitate cobalt(III) oxide hydrate; (p) separating and washing the precipitate of cobalt(III) oxide hydrate; (q) adjusting the pH of the solution obtained in step (p) to 1; (r) adding oxalic acid in the solution obtained in step (q) to precipitate the rare earth oxalate form; (s) separating the precipitate formed in step (r); (t) adjusting the pH of the solution obtained after step (s) for forming a precipitate from nickel(II) hydroxide; and (u) separating the precipitate obtained in step (t).