1. A tape feeder that is used in a component mounting device for installing a component on a board, the component being held by a mounting head, transports a carrier tape containing the component, and supplies the component to a component extraction position by the mounting head, the tape feeder comprising:a tape guideway that has an insertion port into which a leading tape and a following tape can be inserted, the following tape being a carrier tape fed after the leading tape;
a first tape transporter that is provided on a downstream side of the tape guideway, and transports the leading tape to the component extraction position in the tape guideway;
a second tape transporter that is provided on an upstream side of the tape guideway, and transports the following tape from the insertion port to the first tape transporter;
a following tape holder that has a first supporter that supports one side of an uninserted portion of the following tape not inserted into the insertion port in a width direction from a lower side, and a second supporter that supports the other side of the uninserted portion in a width direction from the lower side, and holds the uninserted portion of the following tape at a position separated upward from an uninserted portion of the leading tape; and
a displacer that displaces a position of the second supporter upward with respect to the first supporter, and displaces the uninserted portion of the following tape from the following tape holder,
wherein a width of one end portion of the second supporter decreases toward the insertion port.