A novel activated mesocarbon microbead(aMCMB)/Mn3O4 composite is successfully prepared for electrochemical capacitors. The morphology and crystal structure of the composite are investigated by scanning electron microscopy and X-ray diffraction. The electrochemical studies indicate that the aMCMB/Mn3O4 composite has ideal capacitive performance in 1.0molL−1 LiPF6(EC+DMC). A maximum specific capacitance of 178Fg−1 is obtained for the composite via galvanostatic charge–discharge at a current density of 330mAg−1, and the specific capacitance of Mn3O4 is estimated to be as high as 445Fg−1. The aMCMB/Mn3O4 composite material exhibits ideal capacitive behavior indicating a promising electrode material for electrochemical supercapacitors.