Method for detecting methicillin resistance gene and method for detecting staphylococcus aureus

A nucleic acid primer set for constructing a composition, said composition having high storage stability in a liquid state, for detecting a methicillin resistance gene; a method for detecting a methicillin resistance gene using a composition that comprises the nucleic acid primer set; etc. The present invention addresses the problem of providing a method, whereby Staphylococcus aureus that carries a newly found mutated nuc gene can be detected similar to usual Staphylococcus aureus , and a detection reagent for performing the method. A method for detecting nuc gene of Staphylococcus aureus that comprises using a nucleic acid primer set for detecting a methicillin resistance gene, said primer set consisting of a specific forward primer and a specific reverse primer, or a specific forward primer and a reverse primer, together with a probe.