A liquid discharge apparatus comprising: a liquid application device configured to apply a liquid onto a sheet; a sheet heater comprising: a first conveyance belt configured to convey a sheet on which a liquid has been discharged in a conveyance direction; a heating unit facing the first conveyance belt, the heating unit configured to heat the sheet conveyed by the first conveyance belt; and a second conveyance belt disposed upstream of the first conveyance belt in the conveyance direction, the second conveyance belt configured to convey the sheet to the first conveyance belt, wherein a surface temperature of the second conveyance belt is lower than a surface temperature of the first conveyance belt when the first conveyance belt and the second conveyance belt convey the sheet; and a preheater configured to heat the sheet upstream of the second conveyance belt in the conveyance direction; a drum facing the liquid application device and disposed upstream from the second conveyance belt in the conveyance direction, the drum configured to convey the sheet onto which the liquid has been applied by the liquid application device toward the second conveyance belt; and a transfer cylinder between the drum and the second conveyance belt, the transfer cylinder configured to convey the sheet from the drum to the second conveyance belt, wherein the preheater faces the transfer cylinder. a liquid application device configured to apply a liquid onto a sheet; a sheet heater comprising: a first conveyance belt configured to convey a sheet on which a liquid has been discharged in a conveyance direction; a heating unit facing the first conveyance belt, the heating unit configured to heat the sheet conveyed by the first conveyance belt; and a second conveyance belt disposed upstream of the first conveyance belt in the conveyance direction, the second conveyance belt configured to convey the sheet to the first conveyance belt, wherein a surface temperature of the second conveyance belt is lower than a surface temperature of the first conveyance belt when the first conveyance belt and the second conveyance belt convey the sheet; and a preheater configured to heat the sheet upstream of the second conveyance belt in the conveyance direction; a first conveyance belt configured to convey a sheet on which a liquid has been discharged in a conveyance direction; a heating unit facing the first conveyance belt, the heating unit configured to heat the sheet conveyed by the first conveyance belt; and a second conveyance belt disposed upstream of the first conveyance belt in the conveyance direction, the second conveyance belt configured to convey the sheet to the first conveyance belt, wherein a surface temperature of the second conveyance belt is lower than a surface temperature of the first conveyance belt when the first conveyance belt and the second conveyance belt convey the sheet; and a preheater configured to heat the sheet upstream of the second conveyance belt in the conveyance direction; a drum facing the liquid application device and disposed upstream from the second conveyance belt in the conveyance direction, the drum configured to convey the sheet onto which the liquid has been applied by the liquid application device toward the second conveyance belt; and a transfer cylinder between the drum and the second conveyance belt, the transfer cylinder configured to convey the sheet from the drum to the second conveyance belt, wherein the preheater faces the transfer cylinder.