Background: To study incidence of thrombocytopenia in malarial patients at a hospital. Materials & methods: A total of 100 malaria cases positive on peripheral smear were studied. Malarial parasites were detected by thin & thick smear examination. Laboratory investigations were done. The results were analysed using SPSS software. Results: A study included 100 malaria positive cases. P.vivax is comparatively more common than P.Falciparum and it is more common in males. Conclusion: Thrombocytopenia occurs in both malaria but it is more severe in P. falciparum as compared to P.vivax.