A simulator used in a distributed process simulation includes: a storage unit configured to store map information, agent information, and area allocation information; a simulation execution unit; a condition determination unit configured to determine the condition of the reference agent to be referenced by the simulation execution unit based on a movement state of the agent; an allocation discrimination unit configured to discriminate another computer allocated an area in which the reference agent corresponding to the condition can be located; and an agent information acquisition unit configured to acquire the information about the agent satisfying the condition of the reference agent from the other discriminated computer.