Endocarditis caused by pneumococci is a rare disease and cases that only affect the tricuspid valve represent less than 1% of all cases of endocarditis. A case presenting with a primary pneumonia and septicaemia is described. Due to persistent fever and the occurrence of a cardiac murmur echocardiography was done and demonstrated vegetations on the tricuspid valve. The course was complicated with septic pulmonary emboli before the patient recovered. Endocarditis with pneumococci may occur as a complication to a primary pneumonia and underestimation of the frequency with which it occurs is a possibility. Attention should be paid to patients with a primary pneumonia who do not respond to the initial treatment and to those who after an initial response show recurrent fever.