A liquid cartridge detachably attached to an image forming apparatus to supply liquid to image forming apparatus. The liquid cartridge includes a cartridge case composed of first and second sub cases. At least one of the first and second sub cases includes an open space to accommodate an information storage device in the open space. The first and second sub cases are combined to close the open space and hold the information storage device so as to prevent removal of the information storage device accommodated in the open space therefrom.