A tape cassette for use with a printing device, the printing device comprising a conveying roller and a cassette holder to which the tape cassette is attachable, the tape cassette comprising: a tape roll which is a roll of a tape (153; 228) wound about an axis extending in a first direction (up-down direction), the tape having one end portion and another end portion in the first direction, the tape being configured to be conveyed by the conveying roller; a case accommodating the tape roll therein; and a nipping member (46; 146; 246; 346; 446; 546) provided in the case, the nipping member being configured to nip the tape drawn out from the tape roll and conveyed in a second direction in cooperation with the conveying roller in a state where the tape cassette is attached to the cassette holder, the second direction being perpendicular to the first direction, the nipping member comprising: a first region (46A; 146A; 246A; 346A; 446A; 546A) configured to face the one end portion in the first direction of the tape, the first region and an imaginary reference surface providing a first length (h) in a third direction (front-rear direction) therebetween, the third direction being perpendicular to both the first direction and the second direction; a second region (46B; 146B; 246B; 346B; 446B; 546B) configured to face the another end portion in the first direction of the tape, the second region and the imaginary reference surface providing a second length (h) in the third direction therebetween; and at least one third region (46C; 146C1-C3; 246C; 346C; 446C; 546C) positioned between the first region and the second region in the first direction, characterized in that the at least one third region and the imaginary reference surface providing a third length in the third direction therebetween, wherein the third length is greater than both the first length and the second length, and wherein the imaginary reference surface is positioned closer to a center axis of the nipping member (46; 146; 246; 346; 446; 546) than the at least one third region (46C; 146C1-C3; 246C; 346C; 446C; 546C) is to said center axis. a tape roll which is a roll of a tape (153; 228) wound about an axis extending in a first direction (up-down direction), the tape having one end portion and another end portion in the first direction, the tape being configured to be conveyed by the conveying roller; a case accommodating the tape roll therein; and a nipping member (46; 146; 246; 346; 446; 546) provided in the case, the nipping member being configured to nip the tape drawn out from the tape roll and conveyed in a second direction in cooperation with the conveying roller in a state where the tape cassette is attached to the cassette holder, the second direction being perpendicular to the first direction, the nipping member comprising: a first region (46A; 146A; 246A; 346A; 446A; 546A) configured to face the one end portion in the first direction of the tape, the first region and an imaginary reference surface providing a first length (h) in a third direction (front-rear direction) therebetween, the third direction being perpendicular to both the first direction and the second direction; a second region (46B; 146B; 246B; 346B; 446B; 546B) configured to face the another end portion in the first direction of the tape, the second region and the imaginary reference surface providing a second length (h) in the third direction therebetween; and at least one third region (46C; 146C1-C3; 246C; 346C; 446C; 546C) positioned between the first region and the second region in the first direction, characterized in that the at least one third region and the imaginary reference surface providing a third length in the third direction therebetween, a first region (46A; 146A; 246A; 346A; 446A; 546A) configured to face the one end portion in the first direction of the tape, the first region and an imaginary reference surface providing a first length (h) in a third direction (front-rear direction) therebetween, the third direction being perpendicular to both the first direction and the second direction; a second region (46B; 146B; 246B; 346B; 446B; 546B) configured to face the another end portion in the first direction of the tape, the second region and the imaginary reference surface providing a second length (h) in the third direction therebetween; and at least one third region (46C; 146C1-C3; 246C; 346C; 446C; 546C) positioned between the first region and the second region in the first direction, characterized in that the at least one third region and the imaginary reference surface providing a third length in the third direction therebetween, wherein the third length is greater than both the first length and the second length, and wherein the imaginary reference surface is positioned closer to a center axis of the nipping member (46; 146; 246; 346; 446; 546) than the at least one third region (46C; 146C1-C3; 246C; 346C; 446C; 546C) is to said center axis.