An object of the present invention is to identify genes exhibiting characteristic behavior in the cases of carcinoma such as oral squamous-cell carcinoma using a change of expression level of micro RNA in oral squamous-cell carcinoma as an indicator, so as to provide a method for detecting carcinoma and an agent for suppressing carcinoma. The present invention A method for detecting oral squamous-cell carcinoma, which comprises detecting malignant transformation of specimens by employing a change of expression level of micro RNA as an indicator, and an agent for suppressing oral squamous-cell carcinoma using micro RNA.
