A disc tray for a printing device includes a driving mover including a first guiding portion; a main body including a disc receiver having a holding portion and a sloping portion connected with each other, a second guiding portion engaged with the first guiding portion, and a third guiding portion, with the driving mover driving the main body by way of the first guiding portion and the second guiding portion to move the main body; and a supporter including a fourth guiding portion engaged with the third guiding portion to allow the fourth guiding portion to move along the third guiding portion. The supporter and the holding portion are used to support a printed disc. When the disc receiver receives the printed disc, the supporter is moved to be veiled under the main body for dropping the printed disc from the sloping portion of the disc receiver.