A liquid discharge head comprising: a plurality of discharge orifices arranged to discharge liquid; a plurality of recording elements arranged to generate energy used to discharge liquid; a plurality of pressure chambers having therein the recording elements ; a plurality of supply channels arranged to supply liquid to the pressure chambers ; a common supply channel communicating with the plurality of supply channels and arranged to supply liquid to the plurality of supply channels ; a plurality of recovery channels arranged to recover liquid in the pressure chambers ; and a common recovery channel communicating with the plurality of recovery channels and arranged to recover liquid from the plurality of recovery channels ; wherein the liquid discharge head further comprises a first inlet port arranged to supply liquid from outside of the liquid discharge head to the common supply channel ; a first recovery port arranged to recover liquid from the common supply channel to the outside of the liquid discharge head ; a second inlet port arranged to supply liquid from outside of the liquid discharge head to the common recovery channel ; a second recovery port arranged to recover liquid from the common recovery channel to the outside of the liquid discharge head ; a first negative pressure control unit communicating with the common supply channel ; and a second negative pressure control unit communicating with the common recovery channel , wherein the first inlet port and the first recovery port communicate with each other by the common supply channel without going through the pressure chambers , and wherein the second inlet port and the second recovery port communicate with each other by the common recovery channel without going through the pressure chambers . a plurality of discharge orifices arranged to discharge liquid; a plurality of recording elements arranged to generate energy used to discharge liquid; a plurality of pressure chambers having therein the recording elements ; a plurality of supply channels arranged to supply liquid to the pressure chambers ; a common supply channel communicating with the plurality of supply channels and arranged to supply liquid to the plurality of supply channels ; a plurality of recovery channels arranged to recover liquid in the pressure chambers ; and a common recovery channel communicating with the plurality of recovery channels and arranged to recover liquid from the plurality of recovery channels ; wherein the liquid discharge head further comprises a first inlet port arranged to supply liquid from outside of the liquid discharge head to the common supply channel ; a first recovery port arranged to recover liquid from the common supply channel to the outside of the liquid discharge head ; a second inlet port arranged to supply liquid from outside of the liquid discharge head to the common recovery channel ; a second recovery port arranged to recover liquid from the common recovery channel to the outside of the liquid discharge head ; a first negative pressure control unit communicating with the common supply channel ; and a second negative pressure control unit communicating with the common recovery channel , wherein the first inlet port and the first recovery port communicate with each other by the common supply channel without going through the pressure chambers , and wherein the second inlet port and the second recovery port communicate with each other by the common recovery channel without going through the pressure chambers . <EOS>