The invention provides a sanitary portable urinal for a vehicle. The urinal comprises locating sleeve which can be operated by a single hand of a user who sits down and is used for discharging urine during urinating, a bag opening which is arranged at the upper end of the sleeve and is provided with a circular sheet and a urine bag which is arranged under the locating sleeve; the bag opening of the urine bag can get twisted and sealed as the circular sheet is rotated by several cycles in one direction by fingers, and the bag opening be thoroughly sealed through coordination of an adhesive tapewhich is arranged outside and a binding agent which is pre-applied to the inner surface of the bag, so that urine and smell are prevented from escaping, and the urinal is safe, sanitary and clean; according to the simplest using method, a user can stretch a hand to a trousers crotch from a side opening beside a trousers belt so as to hold the circular sheet and the locating sleeve which is less than 1cm in thickness directly in hand to discharge urine into the urine bag when no people around; therefore, the finished product (the urinal) is available no matter users are under a standing posture or a lying posture, so that life is facilitated, and meanwhile, a circumstance of holding back urine is avoided and health is maintained.