HighlightsInguinal bladder hernia was accidentally found during surgical procedure for incarcerated inguinal hernia.During procedure urinary bladder wall was lesioned.Physicians should think of this condition in elderly, obese male, with sudden onset of lower urinary tract symptoms.Treatment of this condition is surgical, exception are unfit, asymptomatic patients.Urologist should be consulted to exclude urological malignancy – bladder cancer.