Some investigations to forecast the passengers demands for Nagoya International Airport have been achieved up to now by the autho-rities concerned. It has become clear through them that Nagoya Airport has a defective characteristic that the majority of the passengers within its hinterland prefer Narita/Tokyo Airport or Osaka Airport to Nagoya Airport. Hence forecasting the airport choice of the passengers becomes more principal problem than forecasing the total passengers demands within the hinterland of Nagoya Airport.In this study, a modal choice model has been introduced to this problem and a case study has been achieved to the demand forecast of international passengers in Nagoya Airport in 1995.