NOVELTY - Recovery of metal involves reducing a trivalent iron ion to a bivalent iron ion in to-be-processed component containing oxide or hydroxide of objective metal using iron reduction bacteria, leaching by oozing the objective metal in exudate and contacting the exudate containing bivalent iron ion and to-be-processed component while reducing the oxide or hydroxide of objective metal with bivalent iron ion, separating exudate from the to-be processed object as an leaching pregnant solution, and recovering the objective metal in the leaching pregnant solution.    USE - Recovery of metal e.g. magnesium and lithium (claimed) used for steel industry and battery e.g. manganese cell, alkaline cell and lithium-ion secondary battery for electric vehicle.    ADVANTAGE - The method enables efficient recovery of metal from low grade mineral and waste material.    DETAILED DESCRIPTION - Recovery of metal involves reducing a trivalent iron ion to a bivalent iron ion in to-be-processed component containing oxide or hydroxide of objective metal using iron reduction bacteria, leaching by oozing objective metal in exudate and contacting the exudate containing bivalent iron ion and the to-be-processed component while reducing the oxide or hydroxide of the objective metal with the bivalent iron ion, separating the exudate from the to-be processed object as an leaching pregnant solution, and recovering the objective metal in the leaching pregnant solution. The iron reduction process and the leaching process are implemented within separate reaction container. An INDEPENDENT CLAIM is included for metal collection recovery apparatus, which consists of reaction container (1) used in the iron reduction process, and reaction container (2) different from reaction container (A) used in the leaching process.    DESCRIPTION OF DRAWING(S) - The drawing shows the schematic view of process of recovering metal. (Drawing includes non-English language text)    Reaction containers (1,2)    Solid-liquid separation unit (3)    Adsorption separation device (4)    Membrane module (11)