A case of inflammatory pseudotumor (IPS) of the urinary bladder is described. Pseudotumor is rare, and may simulate a malignant tumor either clinically or histopathologically. The outcome is usually favorable after local excision, e.g. transurethral resection of the tumor. Histological examination showed spindle cells in a myxoid background with foci of a loose fascicular pattern, slight capillary proliferation, and inflammatory infiltrate. Immunohistochemical profile of IPS confirmed a myofibroblastic proliferation, and could differentiate IPS from other malignancies of the bladder. It is important to recognize this lesion as benign to avoid potential misdiagnosis and aggressive therapy.