A tape cartridge comprising: a first tape roll that winds a tape wound around a first axis in a manner that enables feed-out and is configured to be stored in a first storage part of a tape processor; a second tape roll configured to take up and wind around a second axis at least a part of said tape fed out from said first tape roll and fed, and to be stored in a second storage part of said tape processor and used; and a connecting arm that connects said first tape roll and said second tape roll; said connecting arm comprising: a pair of first bracket parts that sandwich said first tape roll from one side and the other side along said first axis to rotatably hold said first tape roll, and are provided on one side along a line that connects said first axis and said second axis; and a pair of second bracket parts that sandwich said second tape roll from one side and the other side along said second axis to rotatably hold said second tape roll, and are provided on the other side along said line; characterized by said first bracket parts comprising a substantially oval-shaped first guide part capable of entering a first lead-in groove provided in said first storage part; and said second bracket parts comprising a substantially circular-shaped second guide part capable of entering a second lead-in groove provided in said second storage part. a first tape roll that winds a tape wound around a first axis in a manner that enables feed-out and is configured to be stored in a first storage part of a tape processor; a second tape roll configured to take up and wind around a second axis at least a part of said tape fed out from said first tape roll and fed, and to be stored in a second storage part of said tape processor and used; and a connecting arm that connects said first tape roll and said second tape roll; said connecting arm comprising: a pair of first bracket parts that sandwich said first tape roll from one side and the other side along said first axis to rotatably hold said first tape roll, and are provided on one side along a line that connects said first axis and said second axis; and a pair of second bracket parts that sandwich said second tape roll from one side and the other side along said second axis to rotatably hold said second tape roll, and are provided on the other side along said line; characterized by said first bracket parts comprising a substantially oval-shaped first guide part capable of entering a first lead-in groove provided in said first storage part; and said second bracket parts comprising a substantially circular-shaped second guide part capable of entering a second lead-in groove provided in said second storage part. a pair of first bracket parts that sandwich said first tape roll from one side and the other side along said first axis to rotatably hold said first tape roll, and are provided on one side along a line that connects said first axis and said second axis; and a pair of second bracket parts that sandwich said second tape roll from one side and the other side along said second axis to rotatably hold said second tape roll, and are provided on the other side along said line; characterized by said first bracket parts comprising a substantially oval-shaped first guide part capable of entering a first lead-in groove provided in said first storage part; and said second bracket parts comprising a substantially circular-shaped second guide part capable of entering a second lead-in groove provided in said second storage part.