Abstract: A tape applicator to be used for automatically sticking an adhesive tape onto an object which has two overlapped sheets of papers, for example, a flap of an envelope or wrapped end of wrapping paper, etc. and also for automatically cutting the adhesive tape in a desired length after the object has been stuck by the adhesive tape, without need for the user to directly touch the adhesive tape. The tape applicator of the present invention has the advantages of increasing the tape cutting force and of preventing the idle rotation of the rolled tape, and therefor, it is very excellent in reliability of continuous operation thereof.