This study is purposed to analyze the economic impact of the Mega Sports event on the region by means of the Inter Regional Input Output Analysis in these viewpoints. As a method of study, the tourism industry was re-classified into wholesale and retail business, food business, accommodation and culture amusement service in two inter regional industry relation tables composed of Gangwon-do and Non Gangwon-do, and the economic impact distributed to the district owing to the holding of the ‘2010 Chuncheon World Leisure Congress and Leisure Games' was analyzed by deriving the tourism multiplier. When the economic impact distributed directly and indirectly to the economy of Chunchoen was analyzed, about 45.38 billion Won of production induced effect, about 24.01 billion Won of added value induced, about 8.62 billion Won of income induced effect and about 1,010 employment induced effect had been appeared.