Nowadays, the brands undoubtly represent an important element of the consumer society. The number of brands does not stop increasing, thus creating a confusion in the spirit of the consumers, and resulting in many difficulties and challenges for the businesses. Each year, companies spend a large amount of money on managing their brand so that their brand are known and present in the spirit of the consumers. This drives us to be very concerned by the problems linked to the construction and to the conservation of a strong brand equity for a firm. The brand equity is strongly influenced by symbolic or intangible benefits. The brand is no longer an inanimate object. The marketing activities confer to the brand a personality, a soul. Thanks to that, the brand becomes a partner in its relation with the consumers. This thesis focuses on studying the effect of the brand personality and the congruence on the personality between brand and consumer on the brand equity. It studies the values concerning the construction and the maintenance of a good relation with the consumers that a strong brand equity can bring to the firm. All of experimental studies were implemented in Vietnam. The results bring theoretical contributions for a better understanding of the nature of the mutual relation between the brand equity and the interpersonal relationship between brand and consumer. They furnish methodological contributions by creating a measurement scale both for brand personality and brand equity in the Vietnamese context. They also provide important managerial implications for the companies that want to market their products on the Vietnamese market.
