A prime mover rotation speed display device includes: a prime mover rotation speed acquisition unit configured to acquire a rotation speed; a shift target rotation speed calculation unit configured to calculate a shift target rotation speed; a shift instruction rotation speed calculation unit configured to calculate a shift instruction rotation speed; and a meter display control unit configured to calculate a meter display rotation speed provided for meter display, wherein the meter display control unit calculates the meter display rotation speed based on at least the rotation speed of the prime mover, calculates the meter display rotation speed based on at least the shift instruction rotation speed, performs upper limit control and lower limit control of setting the meter display rotation speed to the shift target rotation speed if the meter display rotation speed is expected to be higher or to be lower than the shift target rotation speed.