Adultery, though not an umbrella concept for all the sexual prohibitions in the Hebrew Bible, enjoys a certain pride of place. Remarkably, it is the one sexual prohibition attested in all biblical genres, which makes it very representative in the Hebrew Bible. It is the only Hebrew biblical sexual prohibition explicitly mentioned in the Decalogue. A solid understanding of Hebrew biblical adultery, therefore, is an important step towards grasping the vital role of human sexuality in the Hebrew Bible, both in terms of inter-human relationships and the relationship between the human and the divine. Without prejudice to the contents of the Hebrew biblical lexicons and theological dictionaries, this work aims at providing a comprehensive understanding of adultery in the Hebrew Bible: its meaning, punishments and the implications thereof. Among others, it corrects some wrong assumptions about the concept of adultery in the Hebrew Bible, and provides a balanced and unbiased Hebrew biblical conception of adultery and the implications thereof for todays couples.