Provided is a steering control unit for improving influence of fluctuations in an estimated electrical angle on steering feel. A steering control unit includes a microcomputer (51) that performs sensorless control of the driving of a motor by using an estimated electrical angle ([theta]mb) estimated by calculation. The microcomputer (51) calculates the estimated electrical angle ([theta]mb) from avalue that is obtained by selectively accumulating a first additional angle ([delta][theta]m1) or a second additional angle ([delta][theta]m2). The microcomputer (51) adjusts a vibration component offluctuations in the estimated electrical angle ([theta]mb) by varying the amount of change in the first additional angle ([delta][theta]m1) and the second additional angle ([delta][theta]m2).