This study presents effects of the strain rate and the Bauschinger effect on forming accuracy in sheet-metal bending. In the bending process, springback is an issue caused by elastic recovery after bending. In recent years, forming simulation is widely used as a method to predict springback. It is important to use material properties that are consistent with actual processing to reproduce springback by finite element analysis. Here, the Bauschinger effect is a factor that affects springback in forming simulations. Therefore, numerical material models that account for the Bauschinger effect have been proposed and improved in springback estimates [1]. However, in addition to the Bauschinger effect, the strain rate is thought to affect springback. A previous study has also reported that both the strain rate and the Bauschinger effect affect stress-strain relationship of materials [2]. Springback might be affected by changes in stress-strain relationships due to the strain rate dependence of the material and inertia forces during the bending process. Therefore, in this study, finite element analysis of sheet bending was performed considering both the strain rate and the Bauschinger effect, and each effect on forming accuracy was investigated. For the strain rate, tensile tests were conducted at different tensile velocities to obtain material properties considering the strain rate dependence. For the Bauschinger effect, analysis was performed using the isotropic hardening model as a reference, with a model that reproduced the yield stress reduction under reversal loading. The analysis could be performed in the isolated investigation of effects of the strain rate and the Bauschinger effect. The analysis results show that both the strain rate and the Bauschinger effect affect springback, respectively. In addition, springback was also affected by the respective velocities of the punch press and pull-up.