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The association of Toxoplasma gondiiinfection with suicide attempts has been scarcely evaluated. Two hundred eighty-three psychiatric outpatients (156 patients with history of suicide attempt and 127 control patients without history of suicide attempt) were examined with enzyme-linked immunoassays for Toxoplasmaimmunoglobulin G (IgG) and IgM antibodies. Seroprevalences of ToxoplasmaIgG and IgM in the cases and the controls were similar: 7 (4.5) and 3 (1.9) vs.10 (7.9) and 3 (2.4) (p= 0.23 and p= 0.55), respectively. In contrast, the ToxoplasmaIgG levels higher than 150 IUml were more frequently observed in the cases than in the controls (100 vs.50, respectively; p= 0.04). The seroprevalence of Toxoplasmainfection increased with age and with the number of suicide attempts. Toxoplasmaseropositivity was associated with reflex impairment, national trips, and snake meat consumption. Our results suggest that although seroprevalence of Toxoplasmainfection is not associated with suicide attempts, a high anti-Toxoplasmaantibody level is, therefore warranting further research.