A die plate comprising: a nozzle group (17, 19) including a plurality of nozzles that each discharge molten resin in an axial direction; and at least one heating medium guidance part (20A, 20B) that receives a heating medium, guides the heating medium, and heats the plurality of nozzles from outside, wherein the plurality of nozzles includes: a plurality of nozzle walls each extending in the axial direction and including an inner peripheral surface surrounding a resin channel that allows the molten resin to flow, and an outer peripheral surface arranged on an opposite side of the inner peripheral surface and along the inner peripheral surface; and a plurality of discharge parts arranged at tips of the plurality of nozzle walls in the axial direction and each discharging the molten resin, and the at least one heating medium guidance part (20A, 20B) includes: at least one reception port (25A, 25B) that receives the heating medium; at least one discharge port (27A, 27B) that discharges the heating medium; and at least one guidance wall that defines a heating channel (29A1, 29A2, 29B1, 29B2) through which the heating medium flows together with the outer peripheral surface of each of the plurality of nozzle walls, the guidance wall guiding the heating medium to cause the heating medium flowing in from the at least one reception port (25A, 25B) to come into contact with the outer peripheral surface of each of the plurality of nozzle walls in a flow direction crossing the axial direction, and then to be discharged from the at least one discharge port (27A, 27B), characterized in that the plurality of nozzles includes a plurality of connection nozzles, and a part of the outer peripheral surface of a first connection nozzle of the plurality of connection nozzles and a part of the outer peripheral surface of a second connection nozzle adjacent to the first connection nozzle are directly connected to each other in a connection direction crossing the axial direction. a nozzle group (17, 19) including a plurality of nozzles that each discharge molten resin in an axial direction; and at least one heating medium guidance part (20A, 20B) that receives a heating medium, guides the heating medium, and heats the plurality of nozzles from outside, wherein the plurality of nozzles includes: a plurality of nozzle walls each extending in the axial direction and including an inner peripheral surface surrounding a resin channel that allows the molten resin to flow, and an outer peripheral surface arranged on an opposite side of the inner peripheral surface and along the inner peripheral surface; and a plurality of discharge parts arranged at tips of the plurality of nozzle walls in the axial direction and each discharging the molten resin, and a plurality of nozzle walls each extending in the axial direction and including an inner peripheral surface surrounding a resin channel that allows the molten resin to flow, and an outer peripheral surface arranged on an opposite side of the inner peripheral surface and along the inner peripheral surface; and a plurality of discharge parts arranged at tips of the plurality of nozzle walls in the axial direction and each discharging the molten resin, and the at least one heating medium guidance part (20A, 20B) includes: at least one reception port (25A, 25B) that receives the heating medium; at least one discharge port (27A, 27B) that discharges the heating medium; and at least one guidance wall that defines a heating channel (29A1, 29A2, 29B1, 29B2) through which the heating medium flows together with the outer peripheral surface of each of the plurality of nozzle walls, the guidance wall guiding the heating medium to cause the heating medium flowing in from the at least one reception port (25A, 25B) to come into contact with the outer peripheral surface of each of the plurality of nozzle walls in a flow direction crossing the axial direction, and then to be discharged from the at least one discharge port (27A, 27B), at least one reception port (25A, 25B) that receives the heating medium; at least one discharge port (27A, 27B) that discharges the heating medium; and at least one guidance wall that defines a heating channel (29A1, 29A2, 29B1, 29B2) through which the heating medium flows together with the outer peripheral surface of each of the plurality of nozzle walls, the guidance wall guiding the heating medium to cause the heating medium flowing in from the at least one reception port (25A, 25B) to come into contact with the outer peripheral surface of each of the plurality of nozzle walls in a flow direction crossing the axial direction, and then to be discharged from the at least one discharge port (27A, 27B), characterized in that the plurality of nozzles includes a plurality of connection nozzles, and a part of the outer peripheral surface of a first connection nozzle of the plurality of connection nozzles and a part of the outer peripheral surface of a second connection nozzle adjacent to the first connection nozzle are directly connected to each other in a connection direction crossing the axial direction.