A component mounter, comprising: a component supply device configured to automatically convey a carrier tape to a pickup position at which components are picked up when the carrier tape is inserted into a tape insertion opening, and a control device configured to perform communication control between the component mounter and the component supply device, the control device including a guidance control section configured to issue guidance of a mounting position of the component supply device to which the carrier tape should be inserted based on information of the component stored in the carrier tape, the information being sent before the carrier tape is mounted on the component supply device, a check control section configured to determine whether the carrier tape has been correctly inserted to the mounting position as guided by the guidance control section, based on a recognition signal of a tape insertion recognition section configured to recognize insertion of the carrier tape into the tape insertion opening, and a supply command sending section configured to send a component supply command to the feeder at the mounting position in a case in which it is determined that the carrier tape has been inserted to the mounting position as guided by the guidance control section. a component supply device configured to automatically convey a carrier tape to a pickup position at which components are picked up when the carrier tape is inserted into a tape insertion opening, and a control device configured to perform communication control between the component mounter and the component supply device, the control device including a guidance control section configured to issue guidance of a mounting position of the component supply device to which the carrier tape should be inserted based on information of the component stored in the carrier tape, the information being sent before the carrier tape is mounted on the component supply device, a check control section configured to determine whether the carrier tape has been correctly inserted to the mounting position as guided by the guidance control section, based on a recognition signal of a tape insertion recognition section configured to recognize insertion of the carrier tape into the tape insertion opening, and a supply command sending section configured to send a component supply command to the feeder at the mounting position in a case in which it is determined that the carrier tape has been inserted to the mounting position as guided by the guidance control section. a guidance control section configured to issue guidance of a mounting position of the component supply device to which the carrier tape should be inserted based on information of the component stored in the carrier tape, the information being sent before the carrier tape is mounted on the component supply device, a check control section configured to determine whether the carrier tape has been correctly inserted to the mounting position as guided by the guidance control section, based on a recognition signal of a tape insertion recognition section configured to recognize insertion of the carrier tape into the tape insertion opening, and a supply command sending section configured to send a component supply command to the feeder at the mounting position in a case in which it is determined that the carrier tape has been inserted to the mounting position as guided by the guidance control section.