The man who builds the ark before the Flood in the Book of Genesis is Noah.
Genesis presents Noah as a righteous man who receives divine instructions to construct a large vessel and preserve his family and representatives of the animal world. The story says that humanity has become corrupt, leading to a catastrophic Flood, while Noah is chosen for survival.
Noah is also central to later Jewish, Christian, and Islamic traditions, although the details differ among the texts. In the Hebrew Bible, he is the father of Shem, Ham, and Japheth. A common mix-up is to call Noah the builder of the Tower of Babel; that story belongs to a later section of Genesis and concerns different people.
After the waters recede, Noah leaves the ark and makes an offering. Genesis then describes a covenant between God, Noah, and all living creatures, symbolized by the rainbow.