In this research, it is studied the relationship between the export quantity of Thai rubber and any factors in economy of Thailand such as exchange rate, crop production index of rubber and export price of Thai rubber. The objective of this research is analyzing the relationship among export quantity of Thai rubber, exchange rate, crop production index of rubber and export price of Thai rubber by using Unit root test and Ordinary Least Square (OLS). This research is used the quarter information form since January 1995 to December 2010, so this research has 64 observations.