The present invention discloses a mirror device that includes a mirror element which further comprising an elastic hinge and a mirror and which modulates incident light emitted from a light source, a device substrate on which a drive circuit for driving the mirror element is placed, a package substrate which is made of transparent glass or a silicon material and on which the device substrate is placed, a metallic thermal transfer path connected to the device substrate, and a cover glass connected to the package substrate so that the device substrate is covered.
