The objectives of this study include: 1) to analyze and investigate the concordance of model of service quality at Na Yai Arm Sub-district Administrative Organization, Na Yai Arm District, Chanthaburi Province with the empirical data, and; 2) to study the effect of administration following the concept of good governance on service quality at Na Yai Arm Sub-district Administration Organization, Na Yai Arm District, Chanthaburi Province. The population consisted of 2,946 heads of households who were registered in Na Yai Arm Sub-District Administrative Organization. There were 352 participants used as a sample group who were selected by using a stratified random sampling technique, while participants from each village were randomly selected by simple random sampling. A questionnaire was used as the research instrument in this study. The statistics used for data analysis was Structural Equation Model Analysis with a Mathematical software package for inspecting the concordance of the developed model with the empirical data and for studying the direct effect of administration following the concept of good governance on service quality at Na Yai Arm Sub-district Administration Organization, Na Yai Arm District, Chanthaburi Province. The findings were as follows: 1. The analysis result showed that the model of service quality fit with the empirical data with Chi-square X2 = 43.332, dƒ = 30, P-value = 0.054, TLI = 0.993, RMSEA = 0.036, SRMR – 0.015, CFI = 0.996 and X2 /dƒ= 1.444. 2. The result of the analysis also showed that administration with good governance affected service quality at Na Yai Arm Sub-district Administrative Organization with the value of direct effect = 0.839 at a statistical significance of 0.01.