A method for producing an iron-nickel alloy from nickel oxide ore, the method comprising: a pellet production step comprising producing a pellet to be used for producing an iron-nickel alloy, and produced by agglomerating a mixture obtained by mixing raw materials including nickel oxide ore, the method of the pellet production step comprising: a mixing process step of generating a mixture by mixing at least the nickel oxide ore, a carbonaceous reducing agent and iron oxide; a pellet formation step of forming a pellet by agglomerating the mixture obtained; a drying process step of drying the pellets at a temperature less than 100 °C; a preheat treatment step of preheat treating the pellets after the drying process step at a temperature of 350 °C to 600 °C; and a reduction step comprising heating the pellet obtained at a reduction temperature of 1400 °C, wherein the nickel oxide ore is limonite, wherein the iron oxide is one of the following (a) and (b) (a) iron ore having an iron quality of at least 50 wt% (b) hematite obtained by wet smelting of nickel oxide ore, and wherein a mixture is generated in the mixing process step such that a proportion of a sum weight of nickel and iron accounting for the total weight of the pellet formed is at least 30 wt%; and wherein the reduction step comprises forming a shell by reduction of nickel oxide and iron oxide contained near the surface of the pellet to obtain an iron-nickel alloy. a pellet production step comprising producing a pellet to be used for producing an iron-nickel alloy, and produced by agglomerating a mixture obtained by mixing raw materials including nickel oxide ore, the method of the pellet production step comprising: a mixing process step of generating a mixture by mixing at least the nickel oxide ore, a carbonaceous reducing agent and iron oxide; a pellet formation step of forming a pellet by agglomerating the mixture obtained; a drying process step of drying the pellets at a temperature less than 100 °C; a preheat treatment step of preheat treating the pellets after the drying process step at a temperature of 350 °C to 600 °C; and a reduction step comprising heating the pellet obtained at a reduction temperature of 1400 °C, wherein the nickel oxide ore is limonite, wherein the iron oxide is one of the following (a) and (b) (a) iron ore having an iron quality of at least 50 wt% (b) hematite obtained by wet smelting of nickel oxide ore, and wherein a mixture is generated in the mixing process step such that a proportion of a sum weight of nickel and iron accounting for the total weight of the pellet formed is at least 30 wt%; and a mixing process step of generating a mixture by mixing at least the nickel oxide ore, a carbonaceous reducing agent and iron oxide; a pellet formation step of forming a pellet by agglomerating the mixture obtained; a drying process step of drying the pellets at a temperature less than 100 °C; a preheat treatment step of preheat treating the pellets after the drying process step at a temperature of 350 °C to 600 °C; and a reduction step comprising heating the pellet obtained at a reduction temperature of 1400 °C, (a) iron ore having an iron quality of at least 50 wt% (b) hematite obtained by wet smelting of nickel oxide ore, and wherein the reduction step comprises forming a shell by reduction of nickel oxide and iron oxide contained near the surface of the pellet to obtain an iron-nickel alloy.