Every country has their traditional clothes. Ao Dai is known as traditional Vietnamese clothes especially women. According to dictionary the definition of Ao Dai is a long-sleeved tunic with ankle-length panels at front and back, worn over trousers. It can be designed with several colors, patterns such as: flower, nature and different kind of fabrics. Wearing Ao Dai, women dignify their body’s attraction as well as reflect a national culture. It has a progress of developing from short simple pattern to more sophisticate style. Ao Dai symbolizes many personalities of Vietnamese women: gentleness, diligence, kindness and bravery. Therefore, it’s very proud for women to put on the special clothes. Student and teacher wears white Ao Dai to high school and some university on Monday to join in the ceremony. Moreover, it is engagement party that the bloom dress in Ao Dai to represent the tradition of Vietnam. Not only in Vietnam, It is also famous in international market that an increasing number of foreign tourists try wearing Ao Dai when visiting my country. They have good comment and congratulation on it. Protecting and preserving the beauty and nature of it are not only the individual’s duty but also all of citizen. Besides, Ao Dai is a beneficial and comfortable costume that women can choose it for any event and party. Although there is a large number of new trend of fashion, Ao Dai always plays an important role in spiritual life of Vietnamese.