A server chassis including a chassis, a motherboard, a processing assembly and a storage assembly. The chassis includes a bottom plate. The bottom plate has a front side and a rear side that are opposite to each other. The chassis has a first area and a second area. The first area is located adjacent to the front side, and the second area is located adjacent to the rear side. The motherboard is disposed on the bottom plate and located between the front side and the rear side. The processing assembly is disposed on the bottom plate and selectively disposed in the first area or the second area. The storage assembly is disposed on the bottom plate and located adjacent to the front side.