Loneliness at work is described as a situation that arises from poor interpersonal relations atthe workplace and one that creates distress. On the other hand, workaholism iscommonly defined asan uncontrolled and compulsive inner drive to work excessively hard. The purpose of this study is todetermine the effect of emotional deprivation and social companionship which were the dimensions workplace loneliness on working excessively and working compulsively which were the dimensions of
workaholism. For this purpose data for the sample was collected from 413 employees and managerswho are working in Kardemir Inc. via survey method. Within the structural equation modeling, pathanalysis was conducted to test the hypotheses. The results show that emotional deprivation had anincreasing effect on working excessively and working compulsively. On the other hand, socialcompanionship had an insignificant effect on working excessively and working compulsively.