Ink-jet recording apparatus

An ink-jet recording apparatus comprising:

• a movable carriage on which a recording head and an ink tank for supplying ink to the recording head are configured to be mounted thereto, the ink tank including a light-emitting unit;
• a conveying roller for conveying a recording medium, the conveying roller disposed upstream of the recording head;
• a discharging roller for discharging the recording medium, the discharging roller disposed downstream of the recording head;
• a driven roller disposed to oppose a recording surface of the recording medium, the driven roller configured to be rotated by the discharging roller;
• and
• a driven roller holder configured to hold the driven roller and further configured to move the driven roller in a direction corresponding to a thickness of the recording medium such that the driven roller abuts on or parts from the discharging roller, the holder including a light-receiving unit configured to receive light from the light-emitting unit.