An inkjet unit and an inkjet device are provided. The inkjet unit includes a liquid compartment that forms a liquid receiving cavity and a jetting nozzle that forms a liquid discharge opening. The liquid receiving cavity is in communication with the liquid discharge opening to allow a liquid contained in the liquid receiving cavity to jet outward through the liquid discharge opening. The inkjet unit further includes a gas supply device. The gas supply device delimits a gas flow channel. The gas flow channel has a gas spray orifice that is arranged to surround an outer wall of the jetting nozzle. Accordingly, the gas supply device can spray a gas through the gas spray orifice toward the circumference of the jetting nozzle to clean the jetting nozzle, keeping liquid from attaching to the circumference of the jetting nozzle and thereby preventing the liquid from blocking the liquid discharge opening.