Optical position measuring device for capturing the relative position of two objects that are movable with respect to one another, consisting of a scanning unit connected to one of the objects and a reflection standard connected to the other one of the two objects, wherein relative position information results from the interfering superposition of at least two pairs of partial beams, to which end - a beam that is incident from a light source undergoes splitting in the scanning unit into at least a first, second and third partial beam in a first splitting plane by way of a first splitting element, and - the first and third partial beams undergo a deflection in the scanning unit in the direction of the reflection standard by way of deflection elements, while the second partial beam undergoes splitting into at least a fourth and fifth partial beam by way of a second splitting element, wherein the first and fourth partial beams propagate in the direction of a first location of incidence, and the third and fifth partial beams propagate in the direction of a second location of incidence on the reflection standard, - and the superposed first and second pairs of partial beams, after reflection at the reflection standard, propagate in the direction of a first and second detector, where the partial beams in each pair are brought into interfering superposition, with the result that the detectors may be used to capture displacement-dependent first and second scanning signals, from which position information relating to a vertical and a first lateral displacement direction of the objects is derivable, wherein the first lateral displacement direction extends in the first splitting plane or parallel thereto, characterized in that the incident beam furthermore undergoes splitting in the scanning unit by way of the first splitting element into further partial beams (30.6, 30.7, 30.8, 30.9, 30.10) in a second splitting plane (yz), which is oriented perpendicular to the first splitting plane (xz), and the partial beams (30.6, 30.7, 30.8, 30.9, 30.10) in the second splitting plane (yz) propagate similar to the partial beams (30.1, 30.2, 30.3, 30.4, 30.5) in the first splitting plane (xz), with the result that third and fourth detectors (26.3, 26.4) may be used to capture displacement-dependent third and fourth scanning signals, from which position information relating to the vertical displacement direction (z) and a second lateral displacement direction (y) of the objects are derivable, wherein the second lateral displacement direction (y) extends in the second splitting plane (yz) or parallel thereto. - a beam that is incident from a light source undergoes splitting in the scanning unit into at least a first, second and third partial beam in a first splitting plane by way of a first splitting element, and - the first and third partial beams undergo a deflection in the scanning unit in the direction of the reflection standard by way of deflection elements, while the second partial beam undergoes splitting into at least a fourth and fifth partial beam by way of a second splitting element, wherein the first and fourth partial beams propagate in the direction of a first location of incidence, and the third and fifth partial beams propagate in the direction of a second location of incidence on the reflection standard, - and the superposed first and second pairs of partial beams, after reflection at the reflection standard, propagate in the direction of a first and second detector, where the partial beams in each pair are brought into interfering superposition, with the result that the detectors may be used to capture displacement-dependent first and second scanning signals, from which position information relating to a vertical and a first lateral displacement direction of the objects is derivable, wherein the first lateral displacement direction extends in the first splitting plane or parallel thereto,