Academic cheating behaviours are common in the Nigerian education system, and secondary school students are not immune because many of them are prone to it. This practice/menace continues to exist despite several countermeasures that have been implemented. Counselling intervention, however, are thought to be able to significantly reduce, if not completely abolish, students' academic cheating behaviours. The study investigated the effect of psycho-education on proneness to academic cheating behaviours among in-school adolescents in Ilorin metropolis, Kwara State, Nigeria.