1. A vehicle travel control apparatus for proxying/assisting driving of a driver by automatically controlling a control object without reference to driving operations of a driver during vehicle travel, the apparatus comprising: detecting means for detecting three or more types of travel data, including a behavior of a vehicle during vehicle travel or in addition to this behavior at least one of a driving operation of a driver and a travel environment of the vehicle; sampling means for sampling all the travel data detected by the detecting means during non-control of the control object by the travel control apparatus; digitization means for digitizing a plurality of preferences of the driver during vehicle travel by performing multiple regression analysis with one travel data expressing a behavior of the vehicle as a target variable and the other travel data as explanatory variables among the travel data sampled by the sampling means; control target computing means for, during control of the control object by the travel control apparatus, computing a control target of the behavior of the vehicle that is the target variable on the basis of, among the travel data detected by the detecting means, the travel data excluding the behavior of the vehicle that is the target variable, and the preference data digitized by the digitization means; and control means for controlling the control object so that the behavior of the vehicle that is the target variable during vehicle travel becomes the control target computed by the control target computing means.