Meta-analysis was used to deal with the data collected in neurobehavioral toxicological studies to synthesize their findings quantitatively. Results revealed neurotoxic chemicals could cause changes in cognitive abilities, psychomotor function and emotion of persons exposed. However, each toxicant had its distinct effects on neurobehavior, for example, lead mainly impairs touch sense, memory, emotion and cognitive abilities, mercury does intelligence, concentration and motor stability, and carbon disulfide does eye-hand coordination. It suggested meta-analysis could be directive to selecting the best combination of neurobehavioral tests.