Plastic ukulele

The invention relates to a plastic ukulele which comprises a panel, a finger plate, a headstock cover plate and a body bottom shell. The panel, the finger plate and the headstock cover plate are buckled on the body bottom shell to form a complete body; a circle of outer contour reinforcing ribs are arranged on the back surface of the panel close to the edge along the outer contour; a sound hole isformed in the middle upper part of the panel; left and right longitudinal reinforcing ribs and upper and lower transverse reinforcing ribs are arranged on the back surface of the panel around the sound hole; the panel part, defined by the lower portion of the lower transverse reinforcing rib and the outer contour reinforcing rib, is a vibration sounding part, the thickness of the vibration sounding part ranges from 1.0 mm to 1.4 mm, parallel obliquely-crossed net-shaped sound beams are arranged on the portion, located on the vibration sounding part, of the back face of the panel, and the net-shaped sound beams and th