PURPOSE: To provide the repair amount estimating system for damaged vehicle capable of easily and exactly executing an accurate estimate.

CONSTITUTION: Collision modes are set by combining three parameters such as (1) the kind of a colliding party, (2) the degree of damage and (3) the part of damage and the respective collision modes, repair jobs and exchange parts are previously stored in a storage means 2 while making them correspondent one and another. When a user inputs three parameters by operating a data input means 1, an arithmetic means 3 judges the collision mode combining those parameters, reads repair job contents and exchange parts names corresponding to the collision mode, calculates a repair amount corresponding to them, displays it on a display device 5 and prints and provides it on paper by using a printing means 6.