A keyboard testing machine for testing a keyboard of an electronic apparatus is provided. The keyboard testing machine includes a rack, a fixing base, and a pressing module. The fixing base is operatively connected to the rack and located over the electronic apparatus. The pressing module is located over the keyboard and includes a drive shaft, a rotating member, and a pressing assembly. The drive shaft is rotatably disposed on the fixing base. The rotating member is sleeved onto the drive shaft and has a cam portion. The pressing assembly is operatively connected to the fixing base and the cam portion. When the drive shaft rotates together with the rotating member, the cam portion drives the pressing assembly to linearly move relative to the fixing base, so as to make the pressing assembly cyclically press the keyboard.