Abstract: A case for tape cassettes comprising a holder for the cassette being in the form of a U-shaped container with enclosed ends which conforms to the configuration of the open side of a cassette and receives the cassette there between, and a flexible strap extending from one side of the U-shaped container and having two cams adapted to tightly fit into the spindle of the reels whereby the U-shaped container is held in place and the reels are prevented from rotating.