1. An electronic component mounter having a mounting head that mounts an electronic component on a board, the electronic component mounter comprising: a board transporter that transports the board with a transport belt supporting the board; a recognizer for recognizing a state of a front surface of the transport belt, the recognizer being provided in the mounting head; and a determiner for determining a degradation state of the transport belt based on the state of the front surface of the transport belt recognized by the recognizer.