A liquid discharge device is provided with a casing, a carriage, a discharge head, a sub tank, a supply nozzle, and a moving device. The casing has a space for housing a main tank. The carriage is capable of moving. The discharge head is arranged on the carriage. The sub tank is also arranged on the carriage. The sub tank is communicated with the discharge head. The supply nozzle is to be communicated with the main tank. The moving device is capable of moving the supply nozzle with respect to the carriage in a way that the supply nozzle pierces through a first position of the sub tank and is inserted into the sub tank. Furthermore, the moving device is capable of moving the supply nozzle with respect to the carriage in a way that the supply nozzle pierces through a second position of the sub tank and is inserted into the sub tank. The second position is a different position from the first position.