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 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 ; 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 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 ; 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 . <EOS>