This research for study behavior of Thai Boxer about consumer behavior study the way to control body and study the quantity of energy in Thai’s boxer by their meal. The target is Thai’s boxer in Huaykwang district Bangkok. There are 36 persons from 2 campuses LUKBANYAI GYM 18 Persons THAIKIETPETCH GYM 18 Persons. The researcher uses Descriptive Research for record there are two ways to keep the result: questionnaire and keep the schedule of their meal. The researchers summarize percentage standard deviation Pearson Correlation Paired Samples Test with standard 0.05 The boxers have consumer behavior low from the base 66.7 upper percentage 33.3 percentages via spread nutrition: Carbohydrate there are include low cholesterol and protein which have upper nutrition from the base of athlete’s nutrition. The result shows good behavior such as eating 5 group and homemade food are 3.01 Bad behavior such as eating protein for health: Glucose eggs boiled 1-4 eggs per day are normal 2.04 The consumer behavior of boxer before fighting concern with hyper nutrition at least if compare boxer’s need with nutrition it shows 0.05 percentages.