Interposition anti-contamination tape dispenser

A tape dispenser comprising an assembled body made of plastics, the assembled body having a circumferential surface forming a recessed cutting opening outside which a cutting blade is arranged, so that an adhesive tape received inside the body is withdrawable through the cutting opening to be cut off for use, wherein the body of the dispenser is formed by jointing two side panels to each other, the side panels having opposite inside surfaces that are raised inward to form engageable portions that are jointed to each other to form an axle that receives the adhesive tape to rotatably fit thereon so as to serve as rotational axis of the adhesive tape, a middle ring being arranged between the two side panels and interposed between and positioned by the side panels, the middle ring having a circumferential surface forming the recessed cutting opening, a pivotal joint slot being formed at one end of the cutting opening to pivotally connecting the cutting blade to facilitate withdrawal and cutting of the adhesive tape, whereby a completely enclosed tape dispenser structure is formed by interposing the middle ring that carries the cutting blade between the two side panels.