The study used the FDM type of 3D printer to set various common and experimental conditions, printed specimens, and then conducted experiments and analyses to find the optimal conditions for the effect of each experimental condition on tensile strength. The factors considered in the experiment were, nozzle temperature, layer height, pattern, and infill density. Three levels were set for each factor: nozzle temperature of 190℃, 200℃, and 210℃; layer heights of 0.2mm, 0.3mm, and 0.4mm; patterns of zigzag, cubic, and concentric; and infill densities of 50%, 60%, and 70%. A three-level orthogonal array was created using the Taguchi method. Specimens were produced using a CREALITY Ender-5 Plus 3D printer, and tensile strength was measured using a Shimadzu AG-250kNX universal testing machine. The measured results were analyzed using ANOVA (Analysis of Variance) and concluded that the optimal conditions for each factor were a layer height of 0.2mm, a nozzle temperature of 210℃, a concentric infill pattern, and an infill density of 70% for maximizing the tensile strength of the specimens.