An ophthalmic laser treatment apparatus comprises: a laser source that emits a laser beam for treatment of an affected part of a patient's eye； an optical fiber that transmits the laser beam emitted from the laser source； and a delivery optical system that irradiates the laser beam emitted from the optical fiber to the affected part of the patient's eye, the delivery optical system including: a plurality of diffraction optical elements each being configured to shape a beam profile of the laser beam at an emission end face of the optical fiber into a beam profile having one of a uniform intensity and a lower intensity in the center than on the periphery on the affected part and also to shape the laser beam to have a different spot size on the affected part of the patient's eye； and a changing unit which selectively disposing one of the diffraction optical elements on an optical path.
