Abstract: An adhesive tape cutting device is described. The device comprises a plurality of projections for progressively engaging the tape to unroll it. A concavity is formed on each projection between a pair of tape contacting parts on the top face of the projection. One of the contacting parts is higher than the other and cooperating with an adjacent role carrying a cutter blade to automatically rotate the roller in the movement of the projections for unrolling the tape whereby the cutter blade on the roller enters the concavity in a projection to cut the tape thereon. In a second embodiment the projections are on a belt and sloping projections can also be provided on the belt for engaging and rotating a roller carrying a cutter blade.