A tape cassette (30; 308; 309) comprising: a cassette case having a bottom plate forming a bottom surface; a tape roll housed inside the cassette case and on which is wound a tape that is a print medium; a first body provided on a first direction side of the tape roll and positioned on a second direction side of a winding center of the tape roll, the first direction being from one end portion toward another end portion of the bottom plate, the second direction being orthogonal to the first direction and parallel to the bottom surface, the first body forming a feed path of the tape; a first opening (80, 801, 802) provided on the second direction side of the first body and penetrating the bottom plate in an orthogonal direction that is orthogonal to the bottom surface; an ink ribbon roll provided on the second direction side of the first opening (80, 801, 802) and on which is wound an ink ribbon to be used in printing of the tape; a second body provided on the first direction side and the second direction side of a winding center of the ink ribbon roll and forming the feed path; and a first regulating part provided on a fourth direction side of a predetermined path, the predetermined path being the feed path of the tape on the second direction side of the first body and on a third direction side of the second body, the third direction being an opposite direction to the second direction, the fourth direction being an opposite direction to the first direction, the first regulating part being positioned on the fourth direction side of a first virtual line, the first virtual line joining an end portion of the first body on the first direction side and an end portion of the second body on the first direction side, characterized in that the first body is a first rotation body that is configured to be driven to rotate in accordance with feeding of the tape and in that the second body is a second rotation body. a cassette case having a bottom plate forming a bottom surface; a tape roll housed inside the cassette case and on which is wound a tape that is a print medium; a first body provided on a first direction side of the tape roll and positioned on a second direction side of a winding center of the tape roll, the first direction being from one end portion toward another end portion of the bottom plate, the second direction being orthogonal to the first direction and parallel to the bottom surface, the first body forming a feed path of the tape; a first opening (80, 801, 802) provided on the second direction side of the first body and penetrating the bottom plate in an orthogonal direction that is orthogonal to the bottom surface; an ink ribbon roll provided on the second direction side of the first opening (80, 801, 802) and on which is wound an ink ribbon to be used in printing of the tape; a second body provided on the first direction side and the second direction side of a winding center of the ink ribbon roll and forming the feed path; and a first regulating part provided on a fourth direction side of a predetermined path, the predetermined path being the feed path of the tape on the second direction side of the first body and on a third direction side of the second body, the third direction being an opposite direction to the second direction, the fourth direction being an opposite direction to the first direction, the first regulating part being positioned on the fourth direction side of a first virtual line, the first virtual line joining an end portion of the first body on the first direction side and an end portion of the second body on the first direction side, characterized in that the first body is a first rotation body that is configured to be driven to rotate in accordance with feeding of the tape and in that the second body is a second rotation body.