In Bangkok, dental clinics are ubiquitous with high competition in many areas. It was quite difficult for new entries to survive in the market. However, there was an interesting dental clinic that opened in the Asoke area and has more than 4,000 patients within 2 years of opening. The number of employees in this dental clinic was only 20. The purpose of the study was to investigating the corporate culture of this dental clinic and how the corporate culture impacted the company performance. The result of this study showed that this dental clinic had "involvement type" corporate culture. This is another example of a case study about corporate culture and corporate characteristics that motivate employees and ultimately helped organizations maximize their performance. The case study might motivate entrepreneurs to set up the proper corporate culture and help the company to be more sustainable.