To provide a predicting method, a predicting device, a predicting program and a recording medium for working a plurality of prediction data as highly precise prediction data so as to increase predicting precision.

This predicting device which calculates prediction data related to future prediction is provided with a predicting means 50 which calculates n types of prediction data by carrying out prediction by n types of different prediction methods and a prediction value working means 60 which calculates the mean value of the n types of prediction data as prediction data.