This paper studies the importance of political expenditures as the primary determinants of vote shares for Taiwan 2004 legislator campaigns. Taking account of the candidates vote shares conditional on advertising expenditures and several control variables. Our main findings is : The advertising spending, candidateswith same party with mayor, educated level of voters and degree of race competition had a strong effect on candidates vote shares but not for the economic performance. The robust evidences again confirm these above findings using weighted least squares estimation, and the Logit model demonstrates the result of the impact of advertising expenditures on the predicted probability of the win election. Overall, our results help to clarify the role of campaign spending in general, and advertising campaigning in particular, in bringing candidates to win.