The article deals with cases of corruption in Sparta. The author shows that in the 5th century BC right up until the last decade of the Peloponnesian War it was mainly the Spartan kings and their closest relatives who were accused of corruption. But already at the turn of 5th–4th centuries BC almost all civil and military leaders of the country were involved in corruption scandals. At the end of the Peloponnesian War, the number of wealthy citizens who made their fortunes during military campaigns abroad sharply increased. The traditional moral values of equality and fraternity which the Spartans used to be brought up to believe quickly gave way to an unbridled thirst for profit. The author cites examples of corruption scandals in which both individual admirals and the entire Spartan government were embroiled. According to the author, moral corruption of the upper class led to the degradation of the whole society, dramatically increasing the social gap between the rich and the poor.