This research has studied on tourist satisfaction confirmatory factor analysis toward eco-friendly hotel business. The objective is studying variable set which utilizes for main factor in causal factor analysis of European Customer Satisfaction Index (ECSI) model. Questionnaire is used to collect data from tourist sample group of 400 persons who use services at eco-friendly hotel in major attraction cities in central region of Thailand while Frequency, Percentage, Means, Standard Deviation, Pearson's Correlation Analysis, and Confirmatory Factor Analysis were utilized in data analysis. Result of data analysis found that Chi-Square (X²) equals to 1272.62 which has statistical significance at the level of p-value = 0.53, relative Chi-Square (X²/df) = 1.74, Comparative Fit Index (CFI) = 0.96, Goodness of Fit Index (GFI) = 0.95, Adjust Goodness of Fit Index (AGFI) = 0.95 and Root Mean Square Error of Approximation (RMSEA) = 0.013, all of them passed the criteria. In addition, the analysis result of customer satisfaction index in eco-friendly hotel business found that entrepreneur should give priority to customer expectation and follow by satisfaction and perception on product quality respectively