A simulation device includes: a layout setting unit which sets a layout of a power line communication (PLC) network; a parameter setting unit which sets an electrical parameter of the PLC network; a simulation execution unit; and a result output unit which outputs an electrical property obtained by the simulation. The layout setting unit includes: an information obtaining unit which obtains structure information indicating a structure of a building where the PLC network is to be provided and position information of one or more elements included in the PLC network; and a display information output unit which displays, on a display unit that displays information that relates to the PLC network, a diagram that is based on the structure information, and displays at least a portion of the PLC network that is based on the position information such that the portion is superimposed on the diagram.