A steering control device is capable of securing calculation accuracy of an absolute steering angle based on a rotation angle of a motor detected by a relative angle sensor. A steering angle calculating circuit (70) includes a first neutral point calculating circuit (71), a second neutral point calculating circuit (72), and an absolute angle calculating circuit (74). The first neutral point calculating circuit (71) calculates a motor neutral point (theta m01), based on a steering angle (theta s) detected by a steering sensor and a rotation angle (theta m) of a motor detected by the relative angle sensor, when a drive source for driving a vehicle is started. The second neutral point calculating circuit (72) calculates a motor neutral point (theta m02) when the steering angle (theta s) detected by the steering sensor falls within a predetermined angle range in which a specific stroke with respect to the steering angle (theta s) is constant. After the motor neutral point (theta m02) is calculated by the second neutral point calculating circuit (72), the absolute angle calculating circuit (74) calculates the steering angle (theta s) as an absolute angle, using the motor neutral point (theta m02) calculated by the second neutral point calculating circuit (72).