The present study examines the influence of perceived organizational support on employees’ intention to participate in non-mandatory trainings through employees’ dispositional traits. A survey was conducted among 557 middle and first line managers from 25 top Sri Lankan business organizations. The findings indicate that the reason employees’ participate in non-mandatory training programs when they perceive that the organization is supporting them is because this perception of organizational support generates dispositional traits that act favourably to create employees’ intention to involve themselves in these programs. Being one of the early attempts at theorizing on employees’ intention to participate in non-mandatory training, this paper intends to provide an appropriate theoretical foundation through conducting empirical work in the field of non-mandatory training research, while providing valuable insight for managers involved in non-mandatory training of employees.