Practical Ethics is an introduction to applied ethics by modern bioethical philosopher Peter Singer. It was published in 1979 and has since been translated into a number of languages, causing outrage in Germany, Austria and Switzerland.

The work analyzes, in detail, why and how beings' interests should be weighed. He states that a being's interests should always be weighed according to that being's concrete properties, and not according to its belonging to some abstract group

The book studies a number of ethical issues incliding: race, sex, ability, species, abortion, euthanasia, infanticide, embryo experimentation, status of animals, poltiical violence, overseas aid, and obligation to assist others.