A trigger device includes a retaining frame, a swing arm, a toggle switch, a resilient member and a touch component. An end of the swing arm is connected to the middle of the retaining frame, and another end of the swing arm is connected to a magnetic sensor, and an end of the toggle switch is pivotally connected to the top of the retaining frame. The swing arm forms a pressing rod disposed on the toggle switch and pressed for swinging the swing arm. The retaining frame and swing arm are connected to the resilient member, and the touch component is mounted into the retaining frame and installed at another end of the toggle switch. An elastic button is installed between the touch component and the toggle switch for pressing the toggle switch. Obvious feel and tough can be provided to enhance the operability and convenience of the trigger device.