The main treatment for muscle-invasive bladder cancer is radical cystectomy with creation of an artificial intestinal bladder with restoration of transurethral urination is recognized as the best method of urine derivation. Aim - to study the urodynamic features of the artificial bladder. The main study group consisted of 57 patients with invasive bladder cancer who underwent radical cystoprostatectomy with ileocystoplasty in several specialized centers. The artificial bladder, formed from the terminal ileum, shows the original results of an urodynamic study, not similar to the data obtained with various pathologies of the bladder. Patients with severe atony of the neobladder were noted, which potentiated chronic mycotic insufficiency with elements of obstruction and required periodic catheterization. Some patients whose main complaint was urinary incontinence in the daytime and at night, according to the KUDI, demonstrated elements of the lack of overactivity, which can also be the cause of incontinence and requires further study of pathogenetic features and possible correction methods.