reel attaching structure of the above specified typewriter that is the opposite ends of the inner sleeve of the boss section are each formed with an engagement portion for engagement with the second locking pawl and the distance along the rotation axis of the reel between the one end surface of the reel that abuts against the base flange and the one engagement portion of the inner sleeve that engages the second locking pawl when the reel is attached to the support shaft member in normal position is substantially the same as the distance along the rotation axis of the reel between the other end surface of the reel that abuts against the base flange and the other engagement portion of the inner sleeve that engages the second locking pawl when the reel is inverted this arrangement ensures that even if the reel is turned upside down it can be mounted on either of the two support shaft members and can be subjected to the slip off preventing action provided by the second locking pawl as a result the reel initially used for winding the correction tape is removed from the support shaft member on the correction tape winding side turned upside down and reattached to the support shaft member.