An anti-tremor device including a tool unit, a carrying portion, and an anti-tremor module is disclosed. The tool unit is coupled or mounted on the carrying portion. The anti-tremor module is disposed on the carrying portion. The anti-tremor module includes a rotary transmission mechanism and a control module. The control module includes a sensing unit and a control unit. The sensing unit is coupled to the control unit, and the control module is coupled to the rotary transmission mechanism. When the sensing unit senses the tremor of the carrying portion, the control unit controls the rotary transmission mechanism to increase the inertia of the anti-tremor module to eliminate or reduce the tremor of the carrying portion.