Provided is a method of manufacturing a heat-shrinkable cylindrical label having sufficient seal strength. A method of manufacturing a heat-shrinkable cylindrical label includes providing a heat-shrinkable film, manufacturing a printed film including a printing region on which an ink layer is laminated, manufacturing a slit film having a plurality of continuous portions to be the heat-shrinkable cylindrical label, And overlapping a first surface of the slit film and a second surface on a back side of the first surface so as to face each other to form an overlapping portion and continuously ultrasonic-welding at least a portion of the overlapping portion to form a continuously extending seal line, The seal line does not include a printing region between the first and second surfaces facing each other. Figure 1

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