A method of manufacturing a positive electrode for a non-aqueous electrolyte battery includes: applying a positive electrode slurry onto a positive electrode current collector, the positive electrode slurry containing a positive electrode active material, a conductive agent, carboxymethylcellulose, and a latex-based plastic. The method is characterized by including: a first step of dispersing and mixing the carboxymethylcellulose and the conductive agent in an aqueous solution to prepare a conductive agent slurry; and a second step of dispersing and mixing the positive electrode active material and the latex-based plastic in the conductive agent slurry, to prepare the positive electrode slurry.