The process steps of batik are designing, ‘pencantingan’, staining, ‗pelorodan’, and washing. These process steps determine production cost of batik industry. This paper presents application of particle swarm optimization (PSO) method for batik production process optimization. Production cost is determined by the efficiency and calculation of input to output ratio in the production process. In this research, PSO method is used to optimize the production process on Yogyakarta batik industry. The main objective of this research optimization is to minimize the cost incurred in the production process of batik in order to obtain maximum benefit. PSO method has successfully optimized the production goals to be achieved by minimization the using of raw materials and production time.