A cutting device, having a supporting base, a cutter section, a protrusive part, is provided. The supporting base has a first area, in which a tape is placeable, and a second area on a surface thereof. The surface is formed of a resin coating layer in the first area alone between the first area and the second area. The cutter section has a blade and is movable to approach and separate from the surface. The protrusive part protrudes from the cutter section in a direction, toward which an edge of the blade points. When the cutter section approaches the surface of the supporting base, with the protrusive part contacting the surface of the supporting base in the second area, the blade cuts the tape located between the surface of the supporting base in the first area and the blade partly in a direction of thickness of the tape.