To provide a method for separating an electrode substance and a titanium or titanium alloy substrate from an insoluble metal electrode, which is mainly a used electrode or an electrode in use or unused, then recovering the substrate metal to be recycled as it is, and recovering the electrode substance as a precipitate in a high concentration that can be easily recovered with a sufficient concentration.

A recovering method for separating and recovering a coating and a substrate of an insoluble metal electrode is provided, which is a method for separating and recovering an electrode substance and a titanium substrate from an insoluble metal electrode produced by coating a surface of the titanium substrate with the electrode substance containing iridium oxide and/or ruthenium oxide. The method includes steps of: (1) cleaning the surface of the insoluble metal electrode; (2) applying an alkali chloride aqueous solution; (3) heating the insoluble metal electrode coated with the alkali chloride at from 500°C to 700°C; (4) further applying a caustic alkali solution on the electrode surface; (5) heating the electrode and holding a temperature equal to or higher than the melting point of the caustic alkali to react; and (6) dipping the electrode in an acid.

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