A tape cassette comprising: a box-like housing that includes a top wall having a top surface, a bottom wall having a bottom surface and opposing the top wall, and a side wall having a side surface and a specified height, the side wall being formed along peripheries of the top wall and the bottom wall; a tape (55, 57,58, 59) that is mounted within the housing; a first indicator portion provided on the side wall of the housing and adapted to indicate a first element among a plurality of elements of a tape type of the tape (55, 57, 58, 59); and a second indicator portion provided in the bottom wall of the housing and adapted to indicate a second element among the plurality of elements of the tape type that is different from the first element, wherein a rear portion of the bottom surface is provided with a rear indentation, wherein the rear indentation is a stepped portion that is formed between a fist tape wounded on a first tape spool and a second tape wounded on a second tape spool at the rear portion of the housing; wherein the second indicator portion is provided in the rear indentation, wherein the top surface is provided with a top surface affixing portion to which a label sheet is affixed, the top surface affixing portion being provided in a position opposed to the rear indentation, wherein the side wall is provided with a rear surface affixing portion to which the label sheet is affixed, the rear surface affixing portion being provided in a rear surface of the housing among the side surface, the rear surface affixing portion being positioned between the top surface affixing portion and the rear indentation, and wherein the top surface affixing portion, the rear surface affixing portion, and the rear indentation have approximately the same width, are provided on generally the central position of the housing in the left-right direction, and are adapted to form a continuous area that extends over three surfaces of the top surface, the side surface, and the bottom surface. a box-like housing that includes a top wall having a top surface, a bottom wall having a bottom surface and opposing the top wall, and a side wall having a side surface and a specified height, the side wall being formed along peripheries of the top wall and the bottom wall; a tape (55, 57,58, 59) that is mounted within the housing; a first indicator portion provided on the side wall of the housing and adapted to indicate a first element among a plurality of elements of a tape type of the tape (55, 57, 58, 59); and a second indicator portion provided in the bottom wall of the housing and adapted to indicate a second element among the plurality of elements of the tape type that is different from the first element, wherein a rear portion of the bottom surface is provided with a rear indentation, wherein the rear indentation is a stepped portion that is formed between a fist tape wounded on a first tape spool and a second tape wounded on a second tape spool at the rear portion of the housing; wherein the second indicator portion is provided in the rear indentation, wherein the top surface is provided with a top surface affixing portion to which a label sheet is affixed, the top surface affixing portion being provided in a position opposed to the rear indentation, wherein the side wall is provided with a rear surface affixing portion to which the label sheet is affixed, the rear surface affixing portion being provided in a rear surface of the housing among the side surface, the rear surface affixing portion being positioned between the top surface affixing portion and the rear indentation, and wherein the top surface affixing portion, the rear surface affixing portion, and the rear indentation have approximately the same width, are provided on generally the central position of the housing in the left-right direction, and are adapted to form a continuous area that extends over three surfaces of the top surface, the side surface, and the bottom surface.