Storage container for recording tape cartridge

A storage container for a magnetic recording tape cartridge which has a pair of tape hubs, each having a plurality of hub-toothings equally spaced and having inner facing end faces and projected radially inwardly within a drive shaft inserting hole of the hub, said container comprising:

• an open receptacle container body having a pair of side walls, a bottom wall and an end wall connected with each of said side walls at one end thereof;
• a lid member connected with said receptacle container body for rotation to close the container;
• and
• a pair of hub locking members disposed in either the receptacle container body or the lid member so as to lock said hubs against rotation, each of the hub locking members comprising a column like boss engageable within the drive shaft inserting hole of the hub, and two engaging keys substantially radially outwardly projected from said boss, wherein the improvement is characterized in that said boss has a substantially conical top portion and said keys are arranged in such a manner that at least one of said engaging keys extends into a space between two adjacent hub-toothings while the outermost portion of the other engaging key is located in radial alignment with the end face of any one of said hub-toothings.