A tape cassette, comprising: a housing having a top surface, a bottom surface, a front surface and a pair of side surfaces; a tape (55, 57, 59) that is a print medium mounted in the housing; a tape exit that discharges, from the housing, the tape (55, 57,59) guided in the housing along a predetermined feed path, at least a part of the feed path extending parallel to the front surface; and a type indicator portion provided adjacent to the tape exit and in a specified area of the front surface on an upstream side of the tape exit in a feed direction of the tape (55, 57, 59), the type indicator portion indicating a type of the tape (55, 57, 59) and including a plurality of vertical information sections (X1 to X5) and a plurality of lateral information sections (Y1 to Y3) and an indicator aperture (801, 810) formed in at least one of the plurality of vertical information sections (X1 to X5), the plurality of vertical information sections (X1 to X5) being a plurality of strip-shaped sections extending along a direction orthogonal to the feed direction and the plurality of lateral information sections (Y1 to Y3) being a plurality of strip-shaped sections with approximately same width and extending parallel to the feed direction and adjacent lateral information sections (Y1 to Y3) are adjacent to each other at approximately equal intervals, characterised in that a latching aperture is formed in another area on the front surface, the latching aperture is disposed above all the lateral information sections (Y1 to Y3) in the width direction of the tape, and is arranged upstream of the center line of the cassette case in the feed direction and the indicator aperture is disposed on a lower side of the center line of the tape cassette in the width direction of the tape and is disposed on a downstream side of the center line of the cassette case in the feed direction. a housing having a top surface, a bottom surface, a front surface and a pair of side surfaces; a tape (55, 57, 59) that is a print medium mounted in the housing; a tape exit that discharges, from the housing, the tape (55, 57,59) guided in the housing along a predetermined feed path, at least a part of the feed path extending parallel to the front surface; and a type indicator portion provided adjacent to the tape exit and in a specified area of the front surface on an upstream side of the tape exit in a feed direction of the tape (55, 57, 59), the type indicator portion indicating a type of the tape (55, 57, 59) and including a plurality of vertical information sections (X1 to X5) and a plurality of lateral information sections (Y1 to Y3) and an indicator aperture (801, 810) formed in at least one of the plurality of vertical information sections (X1 to X5), the plurality of vertical information sections (X1 to X5) being a plurality of strip-shaped sections extending along a direction orthogonal to the feed direction and the plurality of lateral information sections (Y1 to Y3) being a plurality of strip-shaped sections with approximately same width and extending parallel to the feed direction and adjacent lateral information sections (Y1 to Y3) are adjacent to each other at approximately equal intervals, characterised in that a latching aperture is formed in another area on the front surface, the latching aperture is disposed above all the lateral information sections (Y1 to Y3) in the width direction of the tape, and is arranged upstream of the center line of the cassette case in the feed direction and the indicator aperture is disposed on a lower side of the center line of the tape cassette in the width direction of the tape and is disposed on a downstream side of the center line of the cassette case in the feed direction.