A composite material including silanated filler and mixed polymerizable tnonomer, having a stable pasty property which keeps well and has a consistent asability. A composite material containing a silanated filler, a polymerizable monomer, and a polytnerization initiator, and may be produced by a process which includes in order of a tiiixed polymerizable monomer preparing step, a mixed polymerizable monotner preserving step, a composite material preparing step, a composite tnaterial preserving step, a cotiiposite tnaterial filling step, atid a stiiall quantity preservitig container preserving step.
