Some people believe that making the morally right decision makes people feel good. However, until now, there has been no empirical evidence in support of this belief. In a representative two-wave longitudinal study of 995 15-year-old adolescents followed for 3 years (until the age of 18) in Switzerland, adolescents were asked about their decisions and emotions following hypothetical dilemmas involving moral obligations versus self-interest. Adolescents predominantly made moral decisions and reported feeling good following these decisions. With age, participants reported more positive emotions following moral decisions. A small number of adolescents made selfish decisions and reported feeling good following these decisions. (Contains 3 tables.)