Fusing device adapted for fusing toners onto a printing media and printing apparatus therewith

A fusing device includes a driving roller and a fusing unit. The driving roller is for driving a printing media to move. The fusing unit includes a heat insulating component, a heating component, a heat conductive component, a heat reflecting component and a fusing component. The heating component is for generating heat. The heat reflecting component includes a reflecting portion having a cross section formed in a conic section substantially. The reflecting portion is located at a side of the heating component away from the heat conductive component for reflecting the heat generated from the heating component to the heat conductive component. The heat conductive component transfers the heat to the fusing component. The fusing component contacts with the printing media to fuse toners onto the printing media when the driving roller drives the printing media to move.