Out of 534 inquired and examined women 151 (28.2%) of them had urinary stress incontinence and 383 (71.7%) women were continent. Of 151 incontinent women 75 (49.6%) of them repeatedly developed the inflammation of the urinary bladder and of 383 continent women data on chronic cystitis were registered in 74 (19.3%). These data pointed to the fact that the previous repeated inflammation of the urinary bladder and then the appearance of urinary stress incontinence could be regarded as one of etiologic factors in the occurrence of urinary stress incontinence.