1. A vehicle position detecting apparatus comprising: a bearing sensor for detecting a running bearing of a vehicle; a distance sensor for detecting a running distance of the vehicle; a present position estimating means for estimating a present position of the vehicle with respect to a reference position in accordance with the running bearing detected by the bearing sensor and the running distance detected by the distance sensor; a map storing means for storing road data indicative of a road map; a map range selecting means for estimating an error amount of the road data stored in the map storing means and determining a range as evaluation range to be used in a map match computing operation from a portion having a small error amount; a map match computing means for effecting the map match computing operation so as to correct the present position on the road map with the use of the present position computed by the present position estimating means and the evaluation range selected by the map range selecting means; an outputting means for outputting the present position of the vehicle corrected by the map computing means; a bent road judging means for judging whether the vehicle is running on a bent road, wherein a tolerance error amount used in the map match operation is increased when the vehicle is judged to run on a bent road.