There is provided a technique that enhances the detection accuracy of a liquid contained in a tank unit. A printer 10 is provided with a tank unit 40A. The tank unit 40A includes a plurality of ink tanks 43A and a plurality of ink cylinder portions 46A. Each of the plurality of ink cylinder portions 46A is connected with corresponding one of the ink tanks 43A by a tube 47, such as to cause ink contained in the corresponding ink tank 43A to flow into the ink cylinder portion 46A. Each of the ink cylinder portions 46A is provided with a pair of terminal pins 96a and 96b that are used for detection of ink. A horizontal sectional area of the ink cylinder portion 46A at a height position where the pair of terminal pins 96a and 96b are provided is smaller than a horizontal sectional area of the ink tank 43A at a corresponding height position.