The book does not name its writer
Job begins by introducing a man named Job, who lived in the land of Uz and sought to live rightly before God (Job 1:1). Unlike Isaiah, Jeremiah, or many of Paul’s letters, though, the book never identifies the person who recorded and arranged this account.
Its ending tells of Job’s response after God speaks, his restored family life, and his death, but no author steps forward there either (Job 42:1-5; Job 42:16-17). So the clearest answer is also the simplest: Scripture does not tell us who wrote Job.
There was a man in the land of Uz, whose name was Job; and that man was perfect and upright, and one that feared God, and eschewed evil.
Could Job have written it?
Job speaks at length throughout the book. Readers hear his sorrow, his protests, his wrestling with his friends, and his humbled response when God answers him. He may have been a source for parts of the story, but the text does not say that he wrote it.
There is a reason many readers hesitate to name Job as the final author. The opening chapters describe a heavenly gathering and conversations between the Lord and Satan, scenes Job could not have watched himself (Job 1:6-10; Job 2:1-5). An unnamed narrator presents those events and shapes the speeches into the book we now have.
Again there was a day when the sons of God came to present themselves before the Lord, and Satan came also among them to present himself before the Lord. And the Lord said unto Satan, From whence comest thou? And Satan answered the Lord, and said, From going to and fro in the earth, and from walking up and down in it. And the Lord said unto Satan, Hast thou considered my servant Job, that there is none like him in the earth, a perfect and an upright man, one that feareth God, and escheweth evil? and still he holdeth fast his integrity, although thou movedst me against him, to destroy him without cause. And Satan answered the Lord, and said, Skin for skin, yea, all that a man hath will he give for his life. But put forth thine hand now, and touch his bone and his flesh, and he will curse thee to thy face.
What about Moses or another writer?
Over the centuries, some Christians and Jewish readers have suggested Moses as the author. Others have proposed an unknown Israelite sage, or someone who preserved an older account of Job. These are possibilities, not conclusions drawn from a statement in Scripture.
The Bible does not directly credit Moses, Job, or any other named person with writing this book. It is wise to hold such theories lightly. Not every biblical book tells us its human author, and Job invites us to be honest about what we can and cannot know.
Then Job answered the Lord, and said, I know that thou canst do every thing, and that no thought can be withholden from thee. Who is he that hideth counsel without knowledge? therefore have I uttered that I understood not; things too wonderful for me, which I knew not. Hear, I beseech thee, and I will speak: I will demand of thee, and declare thou unto me. I have heard of thee by the hearing of the ear: but now mine eye seeth thee.
Why an unknown author does not weaken Job
Knowing the writer’s name would satisfy our curiosity, but it is not what gives Job its authority. Paul teaches that Scripture comes from God and equips his people for faithful living (2 Timothy 3:16-17). The human writer is unnamed, yet the book has been received as God’s word.
Job remains a profound companion for anyone facing suffering that has no easy explanation. James points to Job’s patience and to the Lord’s tender mercy and compassion (James 5:11). Ezekiel also names Job with Noah and Daniel as an example of righteousness (Ezekiel 14:14). Read Job slowly, especially its questions as well as God’s final speeches. It makes room for honest grief while calling us to trust God’s wisdom.
Behold, we count them happy which endure. Ye have heard of the patience of Job, and have seen the end of the Lord; that the Lord is very pitiful, and of tender mercy.