Almaviva comes to the doctor's house again. This time he is disguised as a music teacher. He is pretending that Basilio is ill and that he has come instead. At first Bartolo is suspicious but he soon lets him in when he shows him Rosina's letter. He gives Rosina a singing lesson. Bartolo thinks that Lindoro is one of the Count's servants and that he is trying to get girls for the Count. Bartolo does not want to leave him alone with Rosina, so he gets Figaro (who is a barber) to shave him.