A motor control device includes: a PWM controller that PWM-controls an inverter driving a three-phase motor and including three arm portions, each including a high-side switching element and a low-side switching element connected in series with each other between a first power supply line and a second power supply line connected to a potential lower than a potential of the first power supply line. In an energizing period and a non-energizing period in a case where the three-phase motor is energized from the first power supply line through the PWM-control of the inverter, during a first predetermined period in the energizing period immediately before transition from the energizing period to the non-energizing period, the PWM controller performs a SWEEP of a signal applied to one of the high-side switching element and the low-side switching element, and performs a synchronous rectification control.