A transport device, comprising: a transporting belt configured to transport a medium; a cleaning unit configured to clean the transporting belt with liquid, the cleaning unit including a cleaning section configured to clean the transporting belt by contacting the transporting belt; a sound collecting unit configured to collect a sound generated by operation of the cleaning unit and generated from the cleaning section, and a control unit configured to collect a sound collection result of the sound collecting unit, wherein either: the cleaning section is a wiper unit including a wiper blade configured to wipe the liquid adhering to the transporting belt by contacting the transporting belt, the sound collecting unit is configured to collect a sound generated from the wiper unit, the wiper unit includes a hollow holding member for holding the wiper blade, and the sound collecting unit is accommodated inside the holding member, or the cleaning unit includes a storage tank in which the liquid is stored, the cleaning section is a rotary brush partially immersed in the liquid stored in the storage tank, and configured to clean the transporting belt while rotating, the sound collecting unit is configured to collect a sound generated from the rotary brush, and the sound collecting unit is disposed facing the rotary brush. a transporting belt configured to transport a medium; a cleaning unit configured to clean the transporting belt with liquid, the cleaning unit including a cleaning section configured to clean the transporting belt by contacting the transporting belt; a sound collecting unit configured to collect a sound generated by operation of the cleaning unit and generated from the cleaning section, and a control unit configured to collect a sound collection result of the sound collecting unit, wherein either: the cleaning section is a wiper unit including a wiper blade configured to wipe the liquid adhering to the transporting belt by contacting the transporting belt, the sound collecting unit is configured to collect a sound generated from the wiper unit, the wiper unit includes a hollow holding member for holding the wiper blade, and the sound collecting unit is accommodated inside the holding member, or the cleaning unit includes a storage tank in which the liquid is stored, the cleaning section is a rotary brush partially immersed in the liquid stored in the storage tank, and configured to clean the transporting belt while rotating, the sound collecting unit is configured to collect a sound generated from the rotary brush, and the sound collecting unit is disposed facing the rotary brush. the cleaning section is a wiper unit including a wiper blade configured to wipe the liquid adhering to the transporting belt by contacting the transporting belt, the sound collecting unit is configured to collect a sound generated from the wiper unit, the wiper unit includes a hollow holding member for holding the wiper blade, and the sound collecting unit is accommodated inside the holding member, or the cleaning unit includes a storage tank in which the liquid is stored, the cleaning section is a rotary brush partially immersed in the liquid stored in the storage tank, and configured to clean the transporting belt while rotating, the sound collecting unit is configured to collect a sound generated from the rotary brush, and the sound collecting unit is disposed facing the rotary brush.