Proverb is the treasure where stores people’s folk knowledge, summarized from the general experiences about the nature and social relations. Proverb expressed in focus the way of living, the features of thinking, expressing the thought, it means the way of speaking and thinking of people. Therefore, it is a synthetical phenomenon where the cultural hallmark quite obviously. In that way, we can assert surely that there is the cultural nature inside the proverb. With the linguistic essence and artistic essence, the cultural nature contributes to enhance strength of proverb in folklore in general and genres of literature in particular. This paper reconfirms the range of proverb notion and the line to distinguish proverb from several genres of folk literature. After that, the paper analyzes aspects of content in proverb to enhance the cultural nature of this genre. Proverb is a vivid picture about Vietnamese culture. The paper mentiones on the aspects of material life and the social life that expressed through the topics about the custom in Viet proverb. Particularly, the paper emphasizes and analyses the advantages of proverb in representing conceptions, the way of assessment, philosophy of human life, expressing the ability in thinking and reflecting the psychological life and spirit of Vietnamese. This is the most typical character for nature of proverb in general and being a specific characteristics to distinguish proverb’s cultural essence, making cultral characteristic of proverb is more original than if comparing with the other genres in folklore. The paper indicates that using proverb in the life being an original characteristic in treatment culture of Vietnamese people. For that reason, the paper demonstrates that Viet proverb contains all cultural hallmark of traditional Vietnamese society.