(2551) this research. Aims to study Factors associated with the behavior of the customer service beauty salon Grace Day Spa. Classified by demographic and relationship between behavior and take customer service to a given factor is a review of the marketing mix business services. Customers who use the service and the behavior of repeat customers coming back. The results showed that Customers who use the service are women. Due to the conditions of service of beauty Grace Day Spa. Most are aged between 25-35 years, with a single level of education. A Private Employees and average income per month. 20,001-30,000 baht customer service beauty salon Grace Day Spa. With an average of reviews on the marketing mix business overall was good. And the trend of returning to repeat the overall level of service to repeat the course. The hypothesis testing Customers with demographic factors such as age, marital status, education, occupation and income per month as well. A service behavior beauty Grace Day Spa is different. A statistically significant level. .01 reviews for the overall marketing mix and business aspects of marketing promotion. Process management, pricing, personnel and products. The distribution channels and the physical. There is a relationship in line with the behavior of a beauty parlor Grace Day Spa. The cost of the service time high. The level of statistical significance. 01 and the frequency of visits per month on average. Significant statistical level. .01 service behavior beauty Grace Day Spa, the frequency of visits per month and the cost of the service once a correlation. the same behavior trends for the return to service over moderate. The level of statistical significance. .01