The present invention enables one hot runner device to be shared between a plurality of molds whose resin inlets are disposed at different positions. This hot runner device discharges supplied molten material to a resin inlet 18b of a mold 18. A hot runner body 42 comprises an inlet opening into which the molten material is supplied, an outlet opening from which the molten material is discharged, and a flow passage. The inlet opening is formed at one end, and the outlet opening is formed at the other end. The flow passage connects the inlet opening and the outlet opening. The hot runner body 42 is driven and moved by a drive mechanism 56 so that the outlet opening 52 can make contact with the resin inlet 18b of each of a plurality of molds whose resin inlets 18b are disposed at different positions. Accordingly, the hot runner device can be commonly used for the plurality of molds whose resin inlets are disposed at different positions.