A simulation device for simulating the operations of a robot that follows a workpiece when the workpiece is conveyed by a conveyer that conveys workpieces along an arc-shaped track. The simulation device includes a robot model arranging section that arranges a robot model in virtual space; a conveyer model arranging section that arranges a conveyer model in the virtual space, the conveyer model being capable of conveying a workpiece model along an arc-shaped virtual track; a workpiece model arranging section that arranges a workpiece model on the conveyer model in the virtual space; a detection device model arranging section that arranges a detection device model in the virtual space capable of detecting the workpiece model; an operation range setting section that sets a following operation range of the robot model in the virtual space; and a simulation execution section that executes simulations.