The purpose of this business plan for “Healthy restaurant for Senior Citizen” is to study and construct how to make a successful business of selling healthy food, tailor-made for senior citizen, ones with congenital disease in particular. It is also to assess the feasibility of the business in both short and long terms. Along with Thailand and the world’s rapid changing in economic, environment and social structure, people tend to have sickness easier with numerous new disease and symptom discovered from time to time. Therefore people are now focusing more on preventive action rather than medical curing or treatment. The researcher found the great opportunity to catch the demand of people of 40 years-old or more, who, the research said, pay attention to their health more than any. This healthy food market is huge and still growing very fast, driven mostly by people’s uncertainty of what to eat to be healthy, in which frequent or portion. These doubts together with the hectic of life lead people to eat outside, dine in the restaurant more regularly and indicate another good sight for the business that can serve right dietary and trustworthy food (certified by dietary doctors) for them. This business is a company found originally with 2,000,000 THB. The study shows that the ROI of the business is 77% and the breakeven point can be seen after the first 2 years. So it’s fair to say that the business is a potential and profitable one which yield a good return comparing to nowadays tough economic.