1. A behavior predicting device comprising: a type determining unit that determines whether an object around a vehicle is a motorcycle, a bicycle, or a pedestrian; a characteristic value temporary setting unit that temporarily sets characteristic values of the object on the basis of the type of object determined by the type determining unit; a behavior detecting unit that detects the behavior of the object; a characteristic value correcting unit that corrects the characteristic values of the object temporarily set by the characteristic value temporary setting unit on the basis of the behavior of the object detected by the behavior detecting unit; a type setting unit that sets whether the object is the motorcycle, the bicycle, or the pedestrian on the basis of the characteristic values of the object corrected by the characteristic value correcting unit; and a behavior predicting unit that predicts the behavior of the object on the basis of the type of object set by the type setting unit.