A bicycle control device controls a motor to assist driving of a wheel of a bicycle. The bicycle control device includes a sole first operation switch and a controller. The controller is configured to switch, when the first operation switch is operated, between a ride mode that controls the motor in correspondence with manual driving force and a walk mode that drives the motor in correspondence with the operation of the first operation switch. After switching to the walk mode in accordance with the operation of the first operation switch, the controller is configured to drive the motor in correspondence with the operation of the first operation switch.