Abstract: The invention provides a tape material applicator and computer program capable of applying relatively short tape materials and reducing the difficulty in tape application. The tape material applicator unit (60), mounted on the sixth axis of a robot, includes a disc-shaped member (50) and a roller swing mechanism (80). The tape material clamping device (200), attached to the disc-shaped member (50), clamps one end (304) of the tape material (300), while the guide (100) attached to the roller swing mechanism (80), holds the other end (305) of the tape material (300). The roller (90) presses the tape material (300) onto the workpiece (40). The tape material (300) is applied from one end (304) to the other end (305) along the application path by pressing with the roller (90), while maintaining the unattached part of the tape material (300) elevated from the workpiece (40).