Kawasaki disease (KD) is a global disease in children. The etiology and pathogenesis are unknown. Complications vary among patients. Fever can persist in some after immune globulin (IVIG) administration, termed IVIG-resistant KD. Here, we report two cases of IVIG-resistant KD with severe arthritis. The diagnosis of arthritis was confirmed by magnetic resonance imaging (MRI) showing joint effusion. Remarkably, fever and joint pain had not receded after the second dose of IVIG. To further manage the symptoms, we prescribed low-dose oral prednisone with success. Both fever and joint pain were diminished. We ponder that the low-dose prednisone might be an option to treat IVIG-resistant KD with severe arthritis.