A component mounter including a control device configured to perform communication control with component supply device, a control device including guidance control section configured to issue guidance of a mounting position of component supply device to which carrier tape should be inserted based on information of the component stored in the carrier tape, a check control section configured to determine whether the carrier tape has been correctly inserted to the mounting position as guided by guidance control section, based on a recognition signal of tape insertion recognition section configured to recognize insertion of the carrier tape into 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 guidance control section.