An optical coherence tomography device comprising: a first light source outputting first light; a second light source outputting second light having a longer wavelength range than the first light; a first optical coupler splitting the first light into first reference light and first sample light and outputting the first reference light and the first sample light; a second optical coupler splitting the second light into second reference light and second sample light and outputting the second reference light and the second sample light; a first reference mirror onto which the first reference light is incident and reflecting the first reference light; a second reference mirror onto which the second reference light is incident and reflecting the second reference light; a wavelength combining means combining wavelengths of the first sample light and the second sample light; a first wavelength selective transmitting means reflecting the first sample light incident from the wavelength combining means at a predetermined angle and transmitting the second sample light; an optical path changing means (56, 57) reflecting the first sample light reflected by the first wavelength selective transmitting means at a predetermined angle; a second wavelength selective transmitting means transmitting the second sample light that has passed through the first wavelength selective transmitting means and reflecting the first sample light reflected by the optical path changing means at a predetermined angle; a first lens positioned over an optical path of the first sample light between the first wavelength selective transmitting means and the second wavelength selective transmitting means and concentrating the first sample light; a second lens transforming the first sample light reflected by the second selective transmitting means into parallel light, outputting the parallel light to a first portion of an object to be imaged and concentrating the second sample light that has passed through the second selective transmitting means to a second portion of the object; a first interference pattern detecting means detecting an interference pattern that is generated by a combination of returning light of the first sample light scattered or reflected at the first portion and reflected light of the first reference light reflected by the first reference mirror; and a second interference pattern detecting means detecting an interference pattern that is generated by a combination of returning light of the second sample light scattered or reflected at the second portion and reflected light of the second reference light reflected by the second reference mirror. a first light source outputting first light; a second light source outputting second light having a longer wavelength range than the first light; a first optical coupler splitting the first light into first reference light and first sample light and outputting the first reference light and the first sample light; a second optical coupler splitting the second light into second reference light and second sample light and outputting the second reference light and the second sample light; a first reference mirror onto which the first reference light is incident and reflecting the first reference light; a second reference mirror onto which the second reference light is incident and reflecting the second reference light; a wavelength combining means combining wavelengths of the first sample light and the second sample light; a first wavelength selective transmitting means reflecting the first sample light incident from the wavelength combining means at a predetermined angle and transmitting the second sample light; an optical path changing means (56, 57) reflecting the first sample light reflected by the first wavelength selective transmitting means at a predetermined angle; a second wavelength selective transmitting means transmitting the second sample light that has passed through the first wavelength selective transmitting means and reflecting the first sample light reflected by the optical path changing means at a predetermined angle; a first lens positioned over an optical path of the first sample light between the first wavelength selective transmitting means and the second wavelength selective transmitting means and concentrating the first sample light; a second lens transforming the first sample light reflected by the second selective transmitting means into parallel light, outputting the parallel light to a first portion of an object to be imaged and concentrating the second sample light that has passed through the second selective transmitting means to a second portion of the object; a first interference pattern detecting means detecting an interference pattern that is generated by a combination of returning light of the first sample light scattered or reflected at the first portion and reflected light of the first reference light reflected by the first reference mirror; and a second interference pattern detecting means detecting an interference pattern that is generated by a combination of returning light of the second sample light scattered or reflected at the second portion and reflected light of the second reference light reflected by the second reference mirror.