Disclosed herein is a monoblock dielectric multiplexer capable of processing multi-band signals. The monoblock dielectric multiplexer includes a dielectric block implemented as a hexahedral dielectric forming a body of the monoblock dielectric multiplexer. An external electrode is applied to an external surface of the dielectric block except for to a top surface. Resonant holes are each formed in a cylindrical shape and formed through the top surface and a bottom surface of the dielectric block. Internal electrodes are respectively formed on inner walls of the resonant holes. A plurality of capacitance patterns is formed on the top surface of the dielectric block and is configured to surround corresponding resonant holes. Input/output electrode units are formed and spaced apart from the capacitance patterns and configured to form capacitance coupling to the capacitance patterns. A common antenna stage is formed in a center portion of the dielectric block.