The invention provides a server device. The server device includes a casing, an electronic assembly, and a heat dissipation assembly. The casing includes a housing and a partition. The partition is disposed in the housing and forms an accommodation space and a heat dissipation space in the housing that are not communicated with each other. The housing has a plurality of first vent holes communicated with the heat dissipation space. The electronic assembly is located in the accommodation space. The heat dissipation assembly includes a heat dissipation component and a heat pipe. The heat dissipation component is located in the heat dissipation space. The heat pipe includes a heat absorption portion and a condensation portion connected to each other. The heat pipe is disposed through the partition, the heat absorption portion is thermally coupled to the electronic assembly, and the condensation portion is coupled to the heat dissipation component.