Abstract: A constant speed holding apparatus which, once a vehicle speed is set, maintains the cruise of the vehicle at constant speed by both variable speed control and throttle control. The difference between the set speed and actual speed is detected during vehicle cruise, and if the difference is smaller than a predetermined minute value, the variable speed ratio at the time of the detection is maintained by a correction means so that any possible speed vibration due to mutual interference between variable speed control and throttle control is effectively prevented.

Abstract: A constant speed holding apparatus for maintaining constant vehicle speed by both variable speed control and throttle control, when setting the vehicle speed, wherein, upon detection of a point of time at which set vehicle speed is stored or a specified period of time thereafter, correction is made so that the variable speed ratio at the time immediately prior to the detection is taken as a target variable speed ratio, whereby any possible trouble of overshoot and undershoot with the vehicle speed at the time of speed setting or at a point of time thereafter is prevented so that stable cruise of the vehicle at constant speed is made possible.