A shift range controller includes a target angle setter obtaining, from an output shaft sensor, sensor signals provided by switches. The target angle setter corrects a target count value that corresponds to a requested shift range, based on the respective sensor signals. When a legitimate number of edges are detected within a signal detection range, or an edge detection window for detecting at least one of the sensor signals (e.g., P1 signal), the target angle setter calculates a post-correction target count value based on an actual count value at an edge detection timing. When the number of edges detected in the detection window is greater than the legitimate number, or, when the edge is detected at a position outside the detection window for at least one of the sensor signals, the target angle setter invalidates the correction of the target count value based at least on the one of the sensor signals.