<p>Provided is a cleaner that can easily and efficiently remove organic dirt accumulated on a flat plate surface such as a display-input member (touch panel member) in a portable device. The cleaner (10) provided by the present invention is a pressure-sensitive adhesive plate surface cleaner (10) that comprises a pressure-sensitive adhesive body (30) having a removable pressure-sensitive adhesive and is used so as to allow the pressure-sensitive adhesive body (30) to contact a flat plate surface (2) of a plate such as a portable device (1) having a flat surface in order to remove organic dirt accumulated on the plate surface (2).</p>
