A cooling plate for a notebook comprises a base, a deck, a support jig, and a mouse piece, wherein the base is axially connected with the deck and includes an air hole formed thereon, the air hole includes a fin and a fixing panel connected therewith, the base also includes a recessed opening adjacent to the air hole, the deck includes a chamber formed on a middle portion thereof and having a number of positioning tabs attached on two sides of the chamber individually, and includes two covers disposed on two sides thereof respectively, each cover includes a cut mounted on an inner side thereof and a plurality of engaging protrusions adjacent to an inner side of a bottom surface thereof, the support jig is pivotally disposed in the opening of the base, and the support jig includes two retaining foots arranged on two sides of the rear end thereof.