A motor controller that controls energization of a motor in which a plurality of coils U1 to W2 that applies torque to a rotor is arranged in a circular pattern includes: a rotation speed detection sensor that detects a rotation speed of the motor; and an energization control unit that controls energization of the plurality of coils U1 to W2 using the detected rotation speed. The energization control unit sequentially energizes the plurality of coils U1 to W2 in all energization patterns if the detected rotation speed is outside of predetermined conditions and sequentially energizes the plurality of coils U1 to W2 in remaining energization patterns (for example, U→V phase, V→W phase, V→U phase, W→U phase, and W→V phase) excluding a partial energization pattern (for example, U→W phase) of all energization patterns if the detected rotation speed is within the predetermined conditions.