A motor control unit includes a PWM count calculator, a PWM count setter, and a PWM count changer. The PWM count calculator calculates first PWM counts of phases. Each first PWM count is calculated for a current control period. The PWM count setter sets the first PWM count of each phase as a second PWM count of a corresponding phase. The second PWM count is set for each of PWM periods included in the current control period. The PWM count changer changes the second PWM count of at least one of the phases, without changing the total of the second PWM counts of the at least one phase within the current control period, such that the number of times switching elements corresponding to the at least one phase are switched within the current control period is reduced.