An electric power steering system comprising: an assist mechanism that applies assist force generated by a motor to a steering mechanism of a vehicle; and a controller that controls driving of the motor based on an assist command value (Ta*) that is a target value of a torque output from the motor, characterized in that the controller includes a basic assist component computing unit that computes a first assist component (Ta1*) that is a basic component of the assist command value (Ta*), based on a steering torque (Th) applied to a steering wheel, a steered angle command value computing unit that computes a steered angle command value (θt*) that is a target value of a steered angle (θt) of steered wheels, based on a sum of the steering torque (Th) and the first assist component (Ta1*), a steered angle feedback controller that computes a second assist component (Ta2*) by executing steered angle feedback control for causing an actual steered angle (θt) of the steered wheels to follow the steered angle command value (θt*), a correction component computing unit that computes a correction component (Tc*) based on a steering angle (θs) of the steering wheel, and an assist command value computing unit that computes the assist command value (Ta*) on the basis of a value obtained by subtracting the correction component (Tc*) from a sum of the first assist component (Ta1*) and the second assist component (Ta2*). an assist mechanism that applies assist force generated by a motor to a steering mechanism of a vehicle; and a controller that controls driving of the motor based on an assist command value (Ta*) that is a target value of a torque output from the motor, characterized in that the controller includes a basic assist component computing unit that computes a first assist component (Ta1*) that is a basic component of the assist command value (Ta*), based on a steering torque (Th) applied to a steering wheel, a steered angle command value computing unit that computes a steered angle command value (θt*) that is a target value of a steered angle (θt) of steered wheels, based on a sum of the steering torque (Th) and the first assist component (Ta1*), a steered angle feedback controller that computes a second assist component (Ta2*) by executing steered angle feedback control for causing an actual steered angle (θt) of the steered wheels to follow the steered angle command value (θt*), a correction component computing unit that computes a correction component (Tc*) based on a steering angle (θs) of the steering wheel, and an assist command value computing unit that computes the assist command value (Ta*) on the basis of a value obtained by subtracting the correction component (Tc*) from a sum of the first assist component (Ta1*) and the second assist component (Ta2*). a basic assist component computing unit that computes a first assist component (Ta1*) that is a basic component of the assist command value (Ta*), based on a steering torque (Th) applied to a steering wheel, a steered angle command value computing unit that computes a steered angle command value (θt*) that is a target value of a steered angle (θt) of steered wheels, based on a sum of the steering torque (Th) and the first assist component (Ta1*), a steered angle feedback controller that computes a second assist component (Ta2*) by executing steered angle feedback control for causing an actual steered angle (θt) of the steered wheels to follow the steered angle command value (θt*), a correction component computing unit that computes a correction component (Tc*) based on a steering angle (θs) of the steering wheel, and an assist command value computing unit that computes the assist command value (Ta*) on the basis of a value obtained by subtracting the correction component (Tc*) from a sum of the first assist component (Ta1*) and the second assist component (Ta2*).