Introduction: The glutamergic receptors affect the synchronization of spike and wave discharges in different animal models of absence seizure. We studied the distribution of a NMDA subtype receptor in CA1 area of the hippocampus. Materials and Methods: Expression of NMDA subreceptor R2, the predominant excitatory neurotransmitter receptor in the brain, was investigated in rats suffering from absence-like seizures. Results: Rats with absence-like seizures exhibited decreased number of these NMDA subreceptors in the hippocampal formation. Conclusion: Changes of expression of these receptors in the hippocampus may be involved in cognition deficits in absence epilepsy.