The Hebrew root הבל is one of the most frequent expressions of the book of Qohelet, so to say one of the keywords of his theology. Besides, within the entire Old Testament, this term appears most frequently in this book. Insofar as הבל carries a value judgment for the message of Qohelet, this term is hugely important. Within the history of research, scholars either concentrate on specific loci of the occurrences or focus on the Hebrew expression in general. In our article, we attempt to categorize all occurrences of הבל according to its contexts in the Book of Qohelet and detect the theological meaning and relevance in both his narrow and the wider literal context. Furthermore, we aim to detect the influence of Qohelet’s special vocabulary in its narrow context of the הבל-paraphrases.