A fan capable of generating omnidirectional airflow includes a central shaft and a fan body. A windward surface of each of blades of the fan body and a radial direction of a motor of the fan body are perpendicular to each other. The central shaft is perpendicular to an axial direction of the motor. The fan body is connected with one side of a support unit. The central shaft is connected with a rotary device. The central shaft is fixed to the support unit. The rotary device can drive the support unit to rotate relative to the central shaft. When the fan is actuated, the blades generate 360-degree outward airflow, and the support unit is rotated by the rotary device so that the fan can generate omnidirectional airflow.