| 摘要 |
A tape cassette comprising tape reels around which a tape-shaped recording medium is wound, a cassette shell in which the tape reels are accommodated, a mouth portion provided at the front portion of the cassette shell so as to be opened in the forward direction and in the up-and-down direction, a part of the tape-shaped recording medium being located so as to traverse the front end of said mouth portion, a front lid located at the front side of the tape-shaped recording medium, and a back lid which is located at the back side of the tape-shaped recording medium to cover the tape-shaped recording medium and provided to the cassette shell so as to be freely movable in the forward and backward direction, the back lid being moved back to the just back side thereof when a lid-open operation is carried out to expose the tape-shaped recording medium to the outside.
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