In an attempt to apply the theory of reasoned action (TRA) to the process underlying organ donor consent, participants completed questionnaires concerning their affective responses to organ donation, as well as their intentions to donate. Participants were given the opportunity to sign an organ donor card. Those who chose to sign the card had more positive attitudes about donation, perceived donation as something that their reference group would encourage, and had stronger intentions to consent to signing a card. The current investigation extends the organ donor literature by using a true behavioral outcome measure indicating consent. Moreover, the pattern of results between attitudes, norms, intention, and behavior illustrates the usefulness of applying the TRA to yet another health-related behavior.