| 摘要 |
A recording tape cassette has a reel which has a hub around which a recording tape is wound, and a flange which is mounted to an end portion of the hub and in which a concave portion is formed at an inner surface of the flange. The reel is rotatably accommodated in a case. A distance of a path of the recording tape from an inner peripheral edge portion of an outer side of the concave portion to an outer peripheral edge portion of the flange, is longer than a distance of a path of the recording tape from the outer peripheral edge portion of the flange to a tape guide at which the recording tape which is drawn out from the reel is first guided.
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