Benign Adult Familial Myoclonic Epilepsy (BAFME) is an autosomal dominant disorder characterized by adult-onset cortical tremor or action myoclonus predominantly in the upper limbs, and generalized seizures. We investigated a Thai BAFME family. Clinical and electrophysiological studies revealed that 13 were affected with BAFME. There were a total of 24 individuals studied. Genetic analysis by genome-wide linkage study (GWLS) was performed using 400 microsatellite markers and excluded linkage of the previous BAFME loci, 8q23. 3-q24. 1, and 2p11. 1-q12. 2. GWLS showed that the disease-associated region in our Thai family was linked to a newly identified locus on chromosome 3q26. 32-3q28. This locus represents the fourth chromosomal region for BAFME.