The present invention relates to a key connecting module for triggering a switch circuit board, where the key connecting module includes a frame having a support structure, and a triggering assembly, and the triggering assembly is accommodated in the support structure and is moveable relative to the frame to trigger the switch circuit board. The triggering assembly includes a first combining part corresponding to a first keycap and a second combining part corresponding to a second keycap. When the key connecting module is connected to the first keycap, the first keycap is combined with the first combining part. When the key connecting module is connected to the second keycap, the second keycap is combined with the second combining part.