Provided is a lithium secondary battery manufacturing method capable of preventing metal foreign objects from being locally precipitated on a negative electrode regardless of types of positive electrodes and of hardly causing a short-circuit. The manufacturing method comprises a step of assembling a cell including a positive electrode, a negative electrode, and a nonaqueous electrolyte; a small amount charging step of, before performing an initial conditioning charge on the assembled cell, performing small amount charging until the positive electrode potential with respect to a metal lithium (Li) reference electrode becomes a potential exceeding an Me dissolution potential at which expected mixed metal species (Me) set in advance start to dissolve; and an Me dissolution potential maintaining step of, after the small amount charging, maintaining the positive electrode potential of the cell to be greater than or equal to the Me dissolution potential for a predetermined time.