A polyvalent vaccine for chicken coccidium-herpesvirus infections comprising as an active ingredient a recombinant herpesvirus comprising a gene encoding SEQ ID NO: 5 which is a microneme protein of a chicken coccidium protozoa or a gene in which part thereof has been substituted, deleted, or added. By administering said polyvalent vaccine into the egg, subcutaneously or intramuscularly, coccidium infections and herpesvirus infections can be prevented.