PROBLEM TO BE SOLVED: To provide a recovery method of a positive electrode active material of a sulfide solid battery, which makes it possible to recover a positive electrode active material and a raw material of a sulfide solid electrolyte while suppressing or preventing the release of hydrogen sulfide to the outside of a process liquid.SOLUTION: A method for recovering a positive electrode active material of a sulfide solid battery, comprises: a first dissolution step in which, when recovering the positive electrode active material from a positive electrode including at least a sulfide solid electrolyte and the positive electrode active material, the positive electrode is immersed in a Li based alkali aqueous solution, thereby dissolving the sulfide solid electrolyte; a separation step in which a liquid solution obtained by the first dissolution step and an insoluble component are separated from each other; a condensation step in which the liquid solution separated by the separation step is condensed; and a
