In the previous papers, rolling experiments of screw-shaped tool were done using gears with a relatively good tooth profile accuracy (2∼3 JIS grade). In this paper, rolling experiments of spur gears with pressure angle errors are done using screw shaped tool with a standard tooth profile. As the amount of rolling stock increases, the pressure angle errors of the works lessen, while tooth profile becomes concave. A simple calculation method to predict the rolled tooth profile is proposed based on the amount of rolling stock experimentally obtained. Two modified tooth profiles of the tool are designed and actually produced. The pressure angle errors are improved and the tendency to produce the concave rolled tooth profiles are suppressed by the new tools.