A touch input device with a button function is provided. The touch input device includes a base member, a touch module, a triggering switch, a linking module, and plural movable pads. The plural movable pads are disposed on the linking module. The linking module is fixed on the base member through a fixing part. Moreover, the linking module is located near the triggering switch, which is disposed on the base member. When the touch module is depressed, the linking module is pushed by the plural movable pads. Consequently, the linking module is swung by using the fixing part as a fulcrum, and the triggering switch is pushed by the linking module. Since the lever arm of the linking module is longer than the lever arm of the prior technology, the touch module is depressed by a smaller force.