Abstract: A disposable flexible plastic enema nozzle with self-adhesive securing means for convenient attachment to the patient's buttocks is disclosed. The securing means comprises an annular positioning collar disposed about the enema tip or tube. The positioning collar has an elongated self-adhesive plastic sheet with easily removable protective tabs covering the adhesive. In one embodiment of the invention the positioning collar is fixed near the distal end of the tube, while in another embodiment the positioning collar is slidable along the tube for adjusting the insertion length of the tube. The invention is particularly applicable to diagnostic enema procedures, such as barium enema for radiological examination, performed on infants, small children, the infirm and the elderly.