According to another note on the same subject here on Wikianswers, (Why does Macbeth see Banquo's ghost?) it was believed at the time the play was written that a murderer could see the ghost of his victim. However in Macbeth it's open to interpretation- is there really a ghost there, or is it a figment of his imagination brought on by a guilty conscience?
At the time of the writing of the Shakespearean play, and during the lifetime of the real historic Macbeth [c. 1014-August 15, 1057], there were many interpretations as to the reactions of a murderer and his victim. One such interpretation was the bleeding of the corpse in the presence of the murderer. Another such interpretation was the ability of the murderer to see the victim, after the murder, as a ghost. Such was the case in Act 3 Scene 4. Macbeth had arranged for the murders of Banquo and of Banquo's son, Fleance. While Banquo was being murdered and his son Fleance escaping, Banquo's ghost attended the Macbeths' banquet at the royal palace at Forres.
because he is so guilty or because it is the witches creation
He was realizing that his past mistakes were going to come back and haunt him. Though he had this epiphany, he never stopped his evil ways and it cost him his life.
He felt guilty, and could not ignore his ghost's presence. Lady Macbeth covered for him, however, by saying Macbeth was encountering a mental illness.
He was frightened.
because he was the one that ordered people to murder him
Macbeth sees the ghost of the recently murdered Banquo.
Banquo's ghost, which shows up at the dinner party the Macbeths are throwing. Only Macbeth can see him.
In Act 3 Scene 3, Macbeth [c. 1014-August 15, 1057] plotted the death of fellow General and friend Banquo with two murderers. In Scene 3, Banquo's murder took place in the park near the royal palace at Forres. In Scene 4, the murderers showed up at the palace to give Macbeth some good news and some bad news. The good news was the successful, fatal slitting of Banquo's throat. The bad news was the escape of Fleance, Banquo's son. Banquo had been invited to the banquet in the aftermath of Macbeth's royal coronation at Scone. He didn't make good on the invite. But his ghost did. In fact, Banquo's ghost succeeded in unsettling Macbeth by taking the royal seat.
Macbeth says that he wishes Banquo was present at the dinner, yet Macbeth murdered Banquo. Macbeth proposed a toast to Banquo so that the Lords would not suspect Macbeth of any foul play. However, later on in this scene Macbeth betrayed himself. He thought he could see Banquos ghost, and he was acting strangely. The Lords were very confused and thought he was going mad and Lady Macbeth had to act for Macbeth and try and save their reputation.
The banquet was a turning point for Macbeth because when hismurderer's killed his best friend ,Banquo. Macbeth saw Banquo's ghost at his coronation and was shocked. After the shocking bit, Macbeth felt ill and was sent to bed.Lady Macbeth was relived to see her evil plan work and she had purposely sent Macbeth to bed and out of sight.
Macbeth sees the ghost of the recently murdered Banquo.
Macbeth
Banquo's ghost, which shows up at the dinner party the Macbeths are throwing. Only Macbeth can see him.
Macbeth sees the ghost of the recently murdered Banquo.
One example of dramatic irony during Macbeth's banquet in Act 3 is when Macbeth sees Banquo's ghost seated at the table, but none of the other guests can see it. This creates tension as Macbeth's reaction to the ghost reveals his guilt, while the other characters remain unaware of the reason for his distress.
In Act 3 of Macbeth, we see Macbeth becoming more ruthless and paranoid as he succumbs to his ambition and insecurity. He becomes more willing to commit murder to maintain his power, as seen when he orders the murder of Banquo and tries to eliminate any threats to his throne. Macbeth's descent into darkness and tyranny is further revealed in Act 3 as he becomes more isolated and consumed by guilt and fear.
In Act 3 Scene 3, Macbeth [c. 1014-August 15, 1057] plotted the death of fellow General and friend Banquo with two murderers. In Scene 3, Banquo's murder took place in the park near the royal palace at Forres. In Scene 4, the murderers showed up at the palace to give Macbeth some good news and some bad news. The good news was the successful, fatal slitting of Banquo's throat. The bad news was the escape of Fleance, Banquo's son. Banquo had been invited to the banquet in the aftermath of Macbeth's royal coronation at Scone. He didn't make good on the invite. But his ghost did. In fact, Banquo's ghost succeeded in unsettling Macbeth by taking the royal seat.
Macbeth says that he wishes Banquo was present at the dinner, yet Macbeth murdered Banquo. Macbeth proposed a toast to Banquo so that the Lords would not suspect Macbeth of any foul play. However, later on in this scene Macbeth betrayed himself. He thought he could see Banquos ghost, and he was acting strangely. The Lords were very confused and thought he was going mad and Lady Macbeth had to act for Macbeth and try and save their reputation.
The banquet was a turning point for Macbeth because when hismurderer's killed his best friend ,Banquo. Macbeth saw Banquo's ghost at his coronation and was shocked. After the shocking bit, Macbeth felt ill and was sent to bed.Lady Macbeth was relived to see her evil plan work and she had purposely sent Macbeth to bed and out of sight.
The ghost upset Macbeth [c. 1014-August 15, 1057] by sitting in the royal seat at the banquet. In Act 3 Scene 1 of the Shakespearean play, Macbeth planned the murder of his friend and former fellow General Banquo. In Scene 3, the murder was carried out by three murderous thugs. In Scene 4, Macbeth hosted a post-coronation celebration banquet to which he hypocritically had invited Banquo. Just before the banquet, Macbeth learned that the thugs had botched the killing. Banquo's throat indeed had been slit. But Banquo's son Fleance had escaped. Macbeth had wanted father and son dead, to prevent Banquo's family from taking over the Scottish crown and throne. At the banquet, Macbeth tried to keep up his hypocritical act of being Banquo's friend. He accused Banquo of deciding not to attend out of discourtesy instead of misadventure. At that point, Banquo's ghost showed up and sat in Macbeth's seat. No one else could see the ghost. It was Banquo's way of saying that Macbeth's murderous plan wasn't going to keep Banquo's line off the Scottish throne. Macbeth subsequently toasted Banquo again. This time, and more kindly, he claimed to be missing his friend's presence. Banquo's ghost again showed up, for Macbeth's eyes only.
The doctor in Macbeth suggests that the person with unnatural troubles should seek help from the divine (B) for a cure, rather than from sources such as witches, Hecate, or Banquo's ghost. This reflects the belief in the play that supernatural problems should be addressed through holy or divine intervention.
Banquo and Macbeth. And the other witches, of course.