Given the current context of social concern regarding the rights of senior citizens, this study describes and evaluates a program of Assertive Social Skills Training (ASST) for elderly people. The participants (2 men and 13 women) were distributed into two groups: the experimental group (EG, which received the ASST) and the placebo group (PG, which was exposed to interactive presentations on several topics). Pre-test and post-test evaluations with IHSI-Del-Prette and the monitoring of the scores indicated the acquisition and maintenance of a repertoire of especially assertive social skills by the EG, but not by the PG. The authors discuss the reliability and importance of the study with a placebo design for assessing the internal validity of the intervention programs in, their critical features and also the importance of this kind of intervention for the elderly in today’s world.