Cyperus rotundus Ethanolic Extract (EECR) investigated for antidepressant, anxiolytic, anticonvulsant and hypnotic and muscle relaxant activities in two different animal models to find out its scientific values. Oral administration of EECR at doses of 200 and 400 mg kgG 1 on various behavioural models such as tail suspension, hole-board, elevated-plus-maze, locomotor, strychnine, maximal electroshock induced seizure, pentylenetetrazole, rotarod, climbing an inclined screen in mice and forced swim light-dark box models in rats was utilized. In the open field test, EECR (200 and 400 mg kgG 1 ) (p<0.05, p<0.01) increased in numbers of rearing. However, the number of central motor and ambulation reduced. The number of entries and the time spent in the open arm were increased while the number of locomotion was decreased (p<0.01) in elevated-plus-maze and actophotometer test, respectively. The EECR (200 and 400 mg kgG 1 ) protected the mice against the pentylenetetrazole and strychnine induced convulsions; it causes significant (p<0.05 and p<0.01) dose dependent increase in latency of convulsion. Treatment with EECR decreased the duration of the tonic hind limb extension induced by electroshock. The EECR treatment also significantly increased the hypnotic's time and decreased motor co-ordination of experimental animals. These findings are consistent with the hypothesis that C. rotundus treatment triggers immobility behavior, time spent in light, locomotor and climbing time in rat and mice model. Further studies will confirm the mechanism of action of C. rotundus for CNS drug development.