Provided is a technique for restraining leakage of a liquid from a tank. An ink tank 25 is provided with an ink injecting part 113, an ink container 120, an atmospheric air introduction part 121, and electrode pins 140a and 140b. A recess 125 that is open downward in the gravity direction when the ink tank 25 is in a posture when ink is supplied to a printing head part 32 is formed in the ink container 120. The electrode pins 140a and 140b are provided in a first upper wall part 131 constituting an upper end wall part of the recess 125. In addition, an ink injection port 135 of the ink injecting part 113 and an atmospheric air introduction port 136 of the atmospheric air introduction part 121 are provided outside the recess 125, in the ink container 120.