An eye axial length measurement apparatus comprises: a light source (11) which emits low coherent light a non-contact eye axial length measurement unit (4a) for optically measuring axial length of a patients eye in non-contact manner, an XYZ driving unit (6, 7) including a base (1), a head support unit (2) attached to the base, and a movable unit (3) which supports the non-contact eye axial length measurement unit (4, 4a, 4b) in an X-Y-Z directions with respect to the base and the apparatus being arranged to split low coherent light emitted from the light source into measuring light and reference light and cause the measuring light and the reference light to interfere with each other, and calculate the eye axial length based on a difference in optical path length between the measuring light and the reference light when an interference signal is obtained. This apparatus further comprises: an ultrasonic eye axial length measurement unit (4b) including an ultrasonic probe (302) with a transducer (312), the unit being placed in a position with a deviation from the non-contact eye axial length measurement unit and determination means (80) for determining whether or not a cloudy portion which is an obstacle to measurement by the non-contact eye axial length measurement unit is present, based on one of a measurement result of the non-contact eye axial length measurement unit and an imaging result of an anterior segment section imaging unit placeable in the non-contact eye axial length measurement unit.
