A heat-shrinkable slitted tube includes a tube main body capable of bending into a tube shape and which shrinks due to application of heat; and a heat-resistant tape which, in a closed state where the tube main body is deformed so as to close a slit extending in a length direction, fastens together areas proximate to two end portions of the tube main body so as to maintain the closed state. In the heat-shrinkable slitted tube, in a case where, by affixing the heat-resistant tape to the tube main body such that one of the end portions is positioned at a short-direction center portion of an indicator of the heat-resistant tape, the other end portion is brought together with the end portion to achieve the closed state, the heat-resistant tape is affixed so as to intervene between the areas proximate to the two end portions.