A urethral compression device prevents male urinary incontinence by compressing the urethra with a continuous, C-shaped structure which includes a curvilinear compression element extending from the inside surface of the structure. The urethral compression device compress the urethra without applying undue force to other parts of the penis. The device incorporates a ratchet mechanism on the ends of the C-shaped structure for the purpose of securing the device in a locked position. The device is designed to allow the user to manipulate the device using only one hand, if so desired.