Plasmodium vivax malaria is increasingly being reported as cause of severe malaria and different manifestation of severe malaria as compared to P. falciparum malaria from several countries across the world. Drug resistance and demographic development will contribute to a further increase in malaria morbidity and mortality. The present study was done to find out the clinico-haematological profile and outcome of malaria. The present study was planned in the Upgraded Department of Paediatrics, Patna Medical College Patna, Bihar from July 2018 to Dec 2018.50 children’s diagnosed with the symptoms of the malaria were enrolled in the present study. Data regarding patient’s age, sex, clinical presentation, investigation and outcome was recorded. The clinical features and lab reports were analysed to label severity based on WHO guidelines for classification of severe malaria Plasmodium vivax was most common etiology of severe malaria in children. It should no longer be considered as benign malaria. Thrombocytopenia was most common haematological observation. P. vivax malaria though traditionally considered to be a benign entity can also have a severe and complicated course, which is usually associated with P. falciparum malaria. Adequate health care should be provided to the patients. More attention should be given to prevention of malaria to avoid cerebral malaria as a serious complications and prompt action taken for those infected.