Abstract: A simulation apparatus includes a load deriving unit that derives a load moment that is generated in an elastic suction pad that holds a workpiece due to the difference between the acceleration rate of a robot arm to which the suction pad is attached and the acceleration rate of the workpiece when executing a simulation in which a simulation model including the workpiece, the suction pad, and the robot arm is moved at an accelerated rate based on an operation instruction, and an execution condition change unit that performs processing for changing, if the load moment derived by the load deriving unit is larger than a threshold value, an execution condition of the simulation such that the load moment derived by the load deriving unit does not exceed the threshold value.