Recording tape cartridge

A recording tape cartridge comprising:

• a case formed to be hollow by a ceiling plate and a bottom plate which oppose one another being joined by peripheral walls, the case rotatably accommodating, in an interior of the case, a single reel on which a recording tape is wound;
• an opening provided in the peripheral walls, the opening being for pulling the recording tape out of the case;
• a leader portion provided at a distal end of the recording tape, and held within the case so as to face the opening;
• and
• a pair of upper and lower cut-out portions communicating with the opening at opposing positions of the ceiling plate and the bottom plate, respectively, the cut-out portions exposing upper and lower ends of the leader portion when the leader portion is in a state of being held at the case;
• wherein the leader portion has a leader tape connected to the distal end of the recording tape, and a pair of attaching pieces which extend toward the outer sides of the leader tape in a direction transverse to the direction which the leader tape is pulled out of the case, and
• wherein the leader portion further has substantially rectangular holding blocks respectively attached to the pair of attaching pieces.