In 1986, Hautmann and at. described the fleal. neobladder as one of the first orthotopic bladder replacement which approached in configuration and function most closely the original organ. The association of the principles of a detubularized small bowel reservoir (Kock) and the anastomosis on the urethral stump with his sphincter give full functional satisfaction. After many modifications and simplifications since the prime description, especially of the ureteral implantation, the technique will be described in all details. (C) 2003 Publie par Elsevier SAS.