In this paper, spirality angle of single jersey fabrics was optimized using the Taguchi experiment design technique, which is a recently famous approach. In the evaluations, analysis of variance (ANOVA) and signal to noise ratio (S/N) were used. Nine fabric configurations with respect to L9 orthogonal design for Taguchi approach were knitted and tested. Relaxation treatment, yam type and loop length, effecting on spirality angle were selected as control factors. Based on the S/N ratio and ANOVA analyses, the optimum levels of these parameters obtained in this paper, relaxation type of dry relaxation, yam type of open end yarn, loop length of 0,25 cm. By using the Taguchi experimental design approach, low number of experiments can be performed to achieve the combination providing the best performance. Thus, before starting manufacturing in factory, it can be easily predict the spirality angle of single jersey fabrics using the defined factors.