A vision testing device, which is a head-mount type vision testing device configured to be mounted on a testee's head, comprising: a display device (240, 240L, 240R) configured to present a visual target to an eyeball of the testee; a display optical system configured to guide a light of the visual target presented on the display device (240, 240L, 240R), to a retina of the eyeball; an imaging device configured to image the eyeball; and an observation optical system configured to guide an image of the eyeball to the imaging device, the display optical system further comprising a mirror configured to reflect a light of a specific wavelength and to transmit the other light at a point closer to the eyeball side than the display device (240, 240L, 240R), wherein an optical axis from a pupil of the eyeball to the mirror in the display optical system and an optical axis from the pupil to the mirror in the observation optical system, coincide with each other, and the optical axis from the pupil of the eyeball to the mirror in the display optical system and an optical axis from the mirror to the display device (240, 240L, 240R) in the display optical system, are bent through the mirror, wherein the display optical system comprises: a first lens provided between the eyeball and the mirror and having an optical axis passing through a center of the pupil of the eyeball; and a second lens group provided between the mirror and the display device (240, 240L, 240R) and provided on an optical axis in a direction reflecting through the mirror with respect to the optical axis of the first lens, the observation optical system shares the first lens with the display optical system, the vision testing device being characterised in that the second lens group comprises at least a lens having a positive refractive power and a lens having a negative refractive power to correct the chromatic aberration of the display optical system. a display device (240, 240L, 240R) configured to present a visual target to an eyeball of the testee; a display optical system configured to guide a light of the visual target presented on the display device (240, 240L, 240R), to a retina of the eyeball; an imaging device configured to image the eyeball; and an observation optical system configured to guide an image of the eyeball to the imaging device, the display optical system further comprising a mirror configured to reflect a light of a specific wavelength and to transmit the other light at a point closer to the eyeball side than the display device (240, 240L, 240R), wherein an optical axis from a pupil of the eyeball to the mirror in the display optical system and an optical axis from the pupil to the mirror in the observation optical system, coincide with each other, and the optical axis from the pupil of the eyeball to the mirror in the display optical system and an optical axis from the mirror to the display device (240, 240L, 240R) in the display optical system, are bent through the mirror, wherein the display optical system comprises: a first lens provided between the eyeball and the mirror and having an optical axis passing through a center of the pupil of the eyeball; and a second lens group provided between the mirror and the display device (240, 240L, 240R) and provided on an optical axis in a direction reflecting through the mirror with respect to the optical axis of the first lens, the observation optical system shares the first lens with the display optical system, the vision testing device being characterised in that the second lens group comprises at least a lens having a positive refractive power and a lens having a negative refractive power to correct the chromatic aberration of the display optical system. a first lens provided between the eyeball and the mirror and having an optical axis passing through a center of the pupil of the eyeball; and a second lens group provided between the mirror and the display device (240, 240L, 240R) and provided on an optical axis in a direction reflecting through the mirror with respect to the optical axis of the first lens, the observation optical system shares the first lens with the display optical system, the vision testing device being characterised in that the second lens group comprises at least a lens having a positive refractive power and a lens having a negative refractive power to correct the chromatic aberration of the display optical system.