A masking tape 1, which is a masking tape 1 for a long part, comprises a base material 11 and a pressure sensitive adhesive layer 12, such that the tearing resistance of the base material 11 in the width direction is 220 mN/15 mm or more. Preferably, in particular, the base material 11 comprises a material in which a machine direction is generated during manufacture, the machine direction of the base material 11 is the longitudinal direction of the masking tape 1, and the tearing resistance of the base material 11 in a direction perpendicular to the machine direction is 220 mN/15 mm or more. Tape breakage is difficult to occur in such a masking tape 1.