Oedipus Rex follows the king of Thebes as he hunts for the man who killed his predecessor, Laius, and discovers that he is that man. Laius was his father, and Jocasta, his wife, is his mother. By the end Jocasta has hanged herself, Oedipus has blinded himself, and he begs to be driven out of the city.
Sophocles' tragedy, usually dated to around 429 BCE and also known as Oedipus the King, uncovers past crimes through a present-day investigation. The killing and marriage have already happened when the play opens; Oedipus does not know whom he killed or married. This summary first explains the events before the opening scene, then follows the king's discoveries from the plague in Thebes to the chorus's last words.
What Happened Before the Play Begins
Long before the opening scene, Apollo's oracle warned King Laius of Thebes that his own son would kill him. When Jocasta bore a boy, the couple had the baby's ankles fastened together and ordered him left to die on Mount Cithaeron. The household shepherd given the job pitied the child and handed him to a shepherd from Corinth. That man brought him to the childless rulers there, Polybus and Merope. The injured feet explain the boy's name: Oedipus means "swollen foot."
He grew up as a prince of Corinth until a drunken guest claimed he was not Polybus's son. Shaken, Oedipus went to Apollo's oracle at Delphi for an answer. The god ignored the question and told him he would kill his father and marry his mother.
To protect Polybus and Merope, he never went home. At a place where three roads meet, he quarreled with an old man in a carriage and killed him and his attendants. One servant escaped. In Thebes he solved the riddle of the Sphinx and was given the throne and the widowed queen.
Each piece of the prophecy is now in place. He has never put them together.
The Plague and a Promise to Find the Killer
The play opens years later, with Thebes dying. Crops fail, cattle die, and women lose children in childbirth. Citizens gather at the palace, and Oedipus, who once saved them from the Sphinx, promises to save them again.
Creon, Jocasta's brother, returns from Delphi with Apollo's answer. The plague will end when Thebes punishes the murderer of Laius, who still lives in the city.
Oedipus takes the case with full confidence and makes it public. He curses Laius's killer and orders every citizen to shun him and drive him out. He extends the curse to himself if he knowingly shelters the murderer in his own house. The audience, who knew the myth, hears exactly who the killer is.
Tiresias Names the King
On Creon's advice, Oedipus summons Tiresias, the blind prophet of Apollo. Tiresias arrives reluctant and asks to be sent home, saying the truth will bring only pain. The refusal enrages the king, who accuses the old man of helping plan the murder.
Provoked, Tiresias says it plainly. Oedipus is the murderer he is looking for. The prophet adds that the man who now sees will leave Thebes blind and a beggar. He will be revealed as both brother and father to his children, son and husband to his mother, and his father's murderer.
That is the whole truth, delivered early, and Oedipus throws it back. A blind man is mocking the king for his blindness, and the king hears only treason. He decides Creon has bribed the prophet to clear a path to the throne, and the next scene is a bitter quarrel between the two men, with Oedipus threatening his brother-in-law with death or exile.
Jocasta's Comfort Raises a New Fear
Jocasta breaks up the quarrel and tries to calm her husband by proving that prophets get things wrong. An oracle once said Laius would die at his son's hands, she explains. Yet their infant was left on a mountain with his ankles bound, and Laius was later killed by robbers at a place where three roads meet.
She means it as comfort. The detail she drops in passing is the one that matters.
Three roads. Oedipus asks where, when, what Laius looked like, and how many traveled with him, and every answer matches his memory of the fight on the road from Delphi. One hope remains: the lone survivor of Laius's party reported robbers, plural. If the story holds, Oedipus is innocent, and he sends for that witness, a shepherd. He now fears he killed Laius. He has no idea Laius was his father.
The Messenger and the Shepherd
Before the shepherd arrives, a messenger comes from Corinth with what he thinks is good news. Polybus has died of old age, and the Corinthians want Oedipus as their king. Oedipus is relieved but still fears marrying Merope. To ease that fear, the messenger reveals that Polybus and Merope were never his parents. He took the baby himself from a Theban shepherd on Mount Cithaeron and freed the ankles that had been pinned together.
Jocasta connects the evidence before Oedipus does. She knows what was done to her own son's feet, and now she hears that the king was found on the same mountain with bound ankles; the messenger also identifies the shepherd who gave him the baby as a servant of Laius. She begs Oedipus to stop asking. He assumes she is afraid he was born a slave. She leaves without another word of explanation.
Uncovering the truth requires both witnesses, because each knows only half. The messenger can prove that Oedipus was a foundling handed over on Cithaeron but not whose child he was. The old shepherd, threatened before he will talk, supplies the rest: Jocasta herself gave him the baby from Laius's house, with orders to destroy it because of a prophecy. He is also the servant who escaped the crossroads.
Oedipus cries out that he has killed his father and married his mother. The search is over.
The Ending: Jocasta's Death and the King's Blinding
Sophocles keeps the worst events offstage, and a second messenger reports them. Jocasta has hanged herself in her bedroom. Oedipus broke in, found her, took the gold brooches from her dress, and drove them into his eyes, crying that they would no longer see what he had suffered and done. The blinding fulfills part of Tiresias's prediction; exile remains undecided.
Blind, Oedipus returns and says that Apollo brought his suffering, but the blinding was his own act. Creon, now in charge, does not gloat. Oedipus begs to be cast out, as his own curse demands, and asks Creon to care for his daughters, Antigone and Ismene.
Creon refuses to decide the exile until he has consulted the god. So the play never shows the king leaving Thebes; his wandering belongs to Sophocles' later play, Oedipus at Colonus. Here Oedipus is led back inside the palace, and the chorus gives the last word: no one should be called happy until he has died free of pain.
Key Takeaways
- The play begins with a plague and a search for Laius's murderer, not with the hero's birth.
- The king investigates a crime without realizing that he committed it.
- Jocasta is both his wife and his biological mother.
- The messenger and shepherd reveal why attempts to escape the prophecy failed.
- The ending shows self-blinding and a request for exile, not the later wandering described in Oedipus at Colonus.
Frequently Asked Questions
Why did Oedipus marry his mom?
He did not know Jocasta was his mother. He believed Polybus and Merope were his parents and left Corinth to avoid the prophecy. When he freed Thebes from the Sphinx, the city gave him its throne and its widowed queen.
What is a famous line from Oedipus Rex?
“I say that you are the killer of the man whose slayer you seek.” Tiresias says this to Oedipus in R. C. Jebb's translation, revised by Alex Sens and Gregory Nagy. It states the central irony: the investigator is hunting himself.
What is the main message of Oedipus Rex?
The play shows how little people can see of their own lives. Oedipus's intelligence and determination drive him to the truth that ruins him. It also suggests that trying to escape a prophecy can be what fulfills it.
What grade level is Oedipus Rex?
It is commonly taught in high school English, often in world literature or drama units, and in college courses on Greek tragedy. Modern translations read clearly, but the incest and violence suit older students.
Is Oedipus Rex based on a true story?
No. It draws on Greek myth that existed long before Sophocles, and Homer's Odyssey already mentions Oedipus's mother marrying her son. Thebes and Corinth were real cities, but the characters belong to legend.
Who is Oedipus?
He is the son of Laius and Jocasta, raised as a prince of Corinth, who became king of Thebes after solving the Sphinx's riddle. He is the hero of Sophocles' Oedipus the King.
The Investigator Becomes the Answer
The investigation changes what the audience is waiting for. Tiresias names the culprit early; the remaining question is how Oedipus will come to accept what he rejects. Jocasta's attempt to discredit prophecy and the messenger's effort to relieve his fear instead supply evidence against him. Each reassurance brings him closer to recognition. The tragedy unfolds not through a final surprise about the killer's identity, but through the collapse of every explanation that might let Oedipus remain innocent.