"The Bible is a manual of bad morals (which) has a powerful influence on our culture and even our way of life. Without the Bible, we would be different, and probably better people," he was quoted as saying by the news agency Lusa.
Saramago attacked "a cruel, jealous and unbearable God (who) exists only in our heads" and said he did not think his book would cause problems for the Catholic Church "because Catholics do not read the Bible.
"It might offend Jews, but that doesn't really matter to me," he added.
In recent history, the Nobel Prize has been awarded to many extreme leftists and anti-Christian figures, including Al Gore, Jimmy Carter, and Yasser Arafat. The fact that it is being awarded to people such as this shows that the Nobel Prize has lost much of its value in the last half century.