A balloon wrapping apparatus for wrapping a balloon provided at a distal portion of an elongated shaft, the balloon wrapping apparatus comprising: a pleating section that forms the balloon with wing shapes; a folding section that folds the wing shapes formed in the balloon, along a circumferential direction; and a support base that supports the shaft, can be moved closer to and away from at least one of the pleating section and the folding section, and can insert the balloon into at least one of the pleating section and the folding section, wherein at least one of the pleating section and the folding section includes an insertion hole (10a, 20a) through which the balloon can be inserted, and a back surface hole (11a, 21a) that is provided in a back surface on a side opposite to a side on which the insertion hole (10a, 20a) is provided and that communicates with the insertion hole (10a, 20a), at least one of the pleating section and the folding section additionally includes an assisting shaft (7, 100, 110) if the corresponding at least one of the pleating section and the folding section includes the insertion hole (10a, 20a) and the back surface hole (11a, 21a), which assisting shaft (7, 100, 110) can be inserted into the back surface hole (11a, 21a) from a back surface side, and a interlock portion interlocking a part of the assisting shaft (7, 100, 110) which part is not inserted in the back surface hole (11a, 21a) with the support base in such a manner that the assisting shaft (7, 100, 110) can be moved together with the support base, and the assisting shaft (7, 100, 110) is formed with a cavity portion from a side opposed to the back surface hole (11a, 21a). a pleating section that forms the balloon with wing shapes; a folding section that folds the wing shapes formed in the balloon, along a circumferential direction; and a support base that supports the shaft, can be moved closer to and away from at least one of the pleating section and the folding section, and can insert the balloon into at least one of the pleating section and the folding section, wherein at least one of the pleating section and the folding section includes an insertion hole (10a, 20a) through which the balloon can be inserted, and a back surface hole (11a, 21a) that is provided in a back surface on a side opposite to a side on which the insertion hole (10a, 20a) is provided and that communicates with the insertion hole (10a, 20a), at least one of the pleating section and the folding section additionally includes an assisting shaft (7, 100, 110) if the corresponding at least one of the pleating section and the folding section includes the insertion hole (10a, 20a) and the back surface hole (11a, 21a), which assisting shaft (7, 100, 110) can be inserted into the back surface hole (11a, 21a) from a back surface side, and a interlock portion interlocking a part of the assisting shaft (7, 100, 110) which part is not inserted in the back surface hole (11a, 21a) with the support base in such a manner that the assisting shaft (7, 100, 110) can be moved together with the support base, and the assisting shaft (7, 100, 110) is formed with a cavity portion from a side opposed to the back surface hole (11a, 21a).