An adhesive tape cartridge comprising: an adhesive tape roll around which an adhesive tape, which comprises an adhesive layer and a separation material layer that covers said adhesive layer, is wound about an axis line in the substantially horizontal direction; and a separation material roll configured to wind said separation material layer around an axis line in the substantially horizontal direction, the separation material layer being peeled from said adhesive tape fed out from said adhesive tape roll and fed, characterized by a connecting arm that freely rotatably supports said adhesive tape roll on one side in the horizontal direction and freely rotatably supports said separation material roll on the other side in the horizontal direction, provided so as to connect said adhesive tape roll and said separation material roll; and guide means configured to cause said adhesive tape fed from said adhesive tape roll to pass in a tape posture with a tape cross-section set to a substantially horizontal direction, substantially contact both tape width direction ends during said passing, and to guide said adhesive tape in said tape width direction, provided in a middle part of said connecting arm, between said adhesive tape roll and said separation material roll along a feeding path of said adhesive tape; wherein said connecting arm comprises a peeling part configured to peel said separation material layer from said adhesive tape fed out from said adhesive tape roll and fed, provided on a downstream side than said guide means along said feeding path; and wherein as viewed from one side along said axis line in the substantially horizontal direction, said adhesive tape roll is supported by said connecting arm so that said adhesive tape is fed out from an outer peripheral part of the adhesive tape roll while rotating in a counterclockwise direction; and said separation material roll is supported by said connecting arm so that said separation material layer peeled by said peeling part is brought in and taken up on a roll outer peripheral part of the separation material roll in a direction substantially opposite to the feeding direction of said adhesive tape fed out from said adhesive tape roll and fed, while rotating in a clockwise direction. an adhesive tape roll around which an adhesive tape, which comprises an adhesive layer and a separation material layer that covers said adhesive layer, is wound about an axis line in the substantially horizontal direction; and a separation material roll configured to wind said separation material layer around an axis line in the substantially horizontal direction, the separation material layer being peeled from said adhesive tape fed out from said adhesive tape roll and fed, characterized by a connecting arm that freely rotatably supports said adhesive tape roll on one side in the horizontal direction and freely rotatably supports said separation material roll on the other side in the horizontal direction, provided so as to connect said adhesive tape roll and said separation material roll; and guide means configured to cause said adhesive tape fed from said adhesive tape roll to pass in a tape posture with a tape cross-section set to a substantially horizontal direction, substantially contact both tape width direction ends during said passing, and to guide said adhesive tape in said tape width direction, provided in a middle part of said connecting arm, between said adhesive tape roll and said separation material roll along a feeding path of said adhesive tape; wherein said connecting arm comprises a peeling part configured to peel said separation material layer from said adhesive tape fed out from said adhesive tape roll and fed, provided on a downstream side than said guide means along said feeding path; and wherein as viewed from one side along said axis line in the substantially horizontal direction, said adhesive tape roll is supported by said connecting arm so that said adhesive tape is fed out from an outer peripheral part of the adhesive tape roll while rotating in a counterclockwise direction; and said separation material roll is supported by said connecting arm so that said separation material layer peeled by said peeling part is brought in and taken up on a roll outer peripheral part of the separation material roll in a direction substantially opposite to the feeding direction of said adhesive tape fed out from said adhesive tape roll and fed, while rotating in a clockwise direction.