HIPS (High Impact Polystyrene) is one of the materials used in 3D printing. Research and application of the use of this material have not been done much, especially in the applications that require flexural strength. This study aims to find a combination of FDM (Fused Deposition Modelling) process parameter settings, that produce experiments with the highest flexural strength, with the optimization process using the experimental design of the Taguchi method with FDM parameters namely the orientation position of the specimen, fill pattern, fill density, and layer. The results showed the confirmation experiment produced the highest flexural strength (32.6753 MPa). In the experiment before confirmation, the highest flexural strength (31,3768 MPa) was shown in experiment number 5 (3rd orientation position, fill pattern lattice, 75% fill density, and 0.125 mm layer thickness).
