The development of a kidney abscess is extremely rare despite the fact that urinary tract infections are quite common during pregnancy. The pathogenesis of renal abscess has changed over the years. Nowadays, more than 75% of the renal abscess arises from a previous urinary tract infection. The authors report the case of a 35 year-old woman, pregnant, with fever, nausea, vomits, right lumbar tenderness, admitted in the urgency room. Clinical examination and complementary diagnostic exams led to the diagnosis of renal abscess. It's made a review of the literature about the subject.