General practitioners are important to the delivery of mental health care because they perform three important functions, as an identifier, as a referral agent and as a caregiver. This study investigates the importance of the attitudes G.P.s hold on their performance of two of these functions, screening and referring. Relying on items developed in previous investigations, four measures of attitudinal dimensions are developed using factor analysis: Belief in Psychogenesis, Psychiatric Fatalism, Referral Reluctance and G.P. as Caregiver. These attitude dimensions are then related to the functions of screening and referral. Three major findings emerge from the results. First, the attitudinal dimensions uncovered are empirically distinct, suggesting that no single pro-to-anti psychiatry is present. Second, attitudes play a role in the screening of cases. A G.P. is more likely to identify cases if he believes in the psychogenesis of physical disorders, and is not concerned that identification and referral will lead to negative consequences for the patient. Third and finally, attitudes do not play a strong role in the referral of cases once they have been identified as such. The findings are presented and interpreted by referring to the sensitive position G.P.s occupy between the public and the psychiatrist.