Mouse preventer for piano

A mouse preventer for a piano relates to a piano-protecting part. A set of mouse preventer is divided into a left part, a middle part and a right part, wherein each part comprises a hole-covering plate, a rubber pad, a bolt and a nut, wherein the hole-covering plate is made of a hard metal plate which is cut into the shape of an I, both sides of the upper end are bent vertically, so that a channel is formed, the bent parts of the upper end are respectively symmetrically provided with a hole, two slots are vertically and downwardly cut on the upper part of the lower end, the hole-covering plate is then transversely and downwardly bent by 90 degrees along the bottoms of the slots, the bottom of the lower end is cut into sawteeth and then slightly bent backward, the bolt then passes through the two holes, and thereby the mouse preventer is produced; during mounting, the upper end of the mouse preventer is bent to form the channel, the mouse preventer is inserted into the lower part of a pedal via a pedal hole, a