An automatic splicing device (20) provided with a communication device (40) configured to communicate with a component mounter (M) or a host computer (HC) that is connected to the component mounter (M) such that communication is possible, a connection control device (100 [103]) configured to control connecting of the a first tape (Tc) and a second tape (Tc), and a display device (90) configured to display information related to connecting of the first tape (Tc) and the second tape (Tc).