Abstract: A power shifter control system for transmitting shifting operation of a change lever (1) via shift cable (5) to a power shifter (2), which incudes a motor (3) for amplifying the transmitted shifting operation force and providing amplified shifting operation force to a transmission. The power shifter control system comprises a displacement sensor (6) for detecting displacement of the power shifter (2), and a controller (4) for controlling the driving of the motor (3) according to an output signal provided from the displacement sensor (6). The controller (4) includes a shifting speed detector (41) for calculating shifting speed according to an output signal provided from the displacement sensor (6), and a motor drive characteristic computer (42) for controlling the shifting force to be constant by increasing the rate of increase of driving force of the motor (3) with increasing shifting speed calculated in the shifting speed calculator (41).