The object is to provide a printing device with a superior gas barrier property in an ink supplying passage. As a solution therefor, an ink supplying unit (10) of an inkjet printing device (100) includes a pressure chamber (11) connected to a supplying passage (21). The pressure chamber (11) is formed of a resin material having a superior gas barrier property, and can be warped by a biasing force in a direction along which a distance between opposing inner walls thereof is increased so as to be able to set an inside of the ink supplying passage to a negative pressure.

A cartridge case includes a case, a spout support portion, a mount portion, a roll-up member, and a lock member. The case includes a first face extending in a first direction. The spout support portion is configured to support a spout provided in a liquid container containing an inkjet liquid. An end portion on a first direction side of an elastic member is mountable in the mount portion. The elastic member generates an energizing force in the first direction. The roll-up member is configured to roll up the liquid container by being moved in the first direction by the energizing force of the elastic member. The lock member is configured to lock movement, in the first direction, of the roll-up member. The lock member is configured to release lock of the roll-up member, based on consumption of the inkjet liquid contained in the liquid container.