A biological tissue inspection apparatus, comprising: a stage on which an inspection object is loaded; and a probe configured to obtain an optical image of the inspection object; and obtain optical interference data about the inspection object of an area that is selected from the optical image, wherein the probe or the stage is movable to obtain the optical interference data about the inspection object of the selected area, wherein the probe includes: an optical imaging device configured to obtain the optical image; an optical interference detector configured to obtain the optical interference data; and a light guide including a magnification changer and configured to: form a first light path along which illumination light is emitted from an illumination light source, reflected from the inspection object, and guided to the optical imaging device to obtain the optical image; and form a second light path by causing measurement light to be incident on the inspection object to obtain the optical interference data, wherein the magnification changer includes a plurality of fixed magnification objective lenses (322, 324, 326), and wherein the first light path and the second light path pass through one of the plurality of fixed magnification objective lenses (322, 324, 326). a stage on which an inspection object is loaded; and a probe configured to obtain an optical image of the inspection object; and obtain optical interference data about the inspection object of an area that is selected from the optical image, obtain an optical image of the inspection object; and obtain optical interference data about the inspection object of an area that is selected from the optical image, wherein the probe or the stage is movable to obtain the optical interference data about the inspection object of the selected area, wherein the probe includes: an optical imaging device configured to obtain the optical image; an optical interference detector configured to obtain the optical interference data; and a light guide including a magnification changer and configured to: form a first light path along which illumination light is emitted from an illumination light source, reflected from the inspection object, and guided to the optical imaging device to obtain the optical image; and form a second light path by causing measurement light to be incident on the inspection object to obtain the optical interference data, an optical imaging device configured to obtain the optical image; an optical interference detector configured to obtain the optical interference data; and a light guide including a magnification changer and configured to: form a first light path along which illumination light is emitted from an illumination light source, reflected from the inspection object, and guided to the optical imaging device to obtain the optical image; and form a second light path by causing measurement light to be incident on the inspection object to obtain the optical interference data, form a first light path along which illumination light is emitted from an illumination light source, reflected from the inspection object, and guided to the optical imaging device to obtain the optical image; and form a second light path by causing measurement light to be incident on the inspection object to obtain the optical interference data, wherein the magnification changer includes a plurality of fixed magnification objective lenses (322, 324, 326), and wherein the first light path and the second light path pass through one of the plurality of fixed magnification objective lenses (322, 324, 326).