a terminal crimping device is composed of an elevating crimper for crimping terminals onto the exposed conductors of cables and an anvil positioned opposite said crimper . the crimper is caused to ascend and descend by means of drive means including a servo motor . the controlling of the terminal crimping operation is done by monitoring the height of the crimper at the time of terminal crimping and the load applied to said drive means and comparing a detected load to the height with the preset reference data to determine whether the terminal crimping performance is good or not . thus , a reliable determination whether the terminal crimping performance is good or not is performed .