The invention relates to a laser instrument for therapy on the human eye, designed for surgery of the cornea, the sclera, the vitreous body or the crystalline lens, especially suitable for use in immediate succession with other instruments for eye diagnosis or eye therapy, in such a way that during the alternating use of the various instruments, the eye or at least the patient preferably remains in a predetermined position and alignment within one and the same treatment area (2). The laser therapy instrument comprises: a beam conducting device with an exit lens system (5) for the therapeutic laser beam, and a device for moving at least part of the beam conducting device, including the exit lens system (5), into the treatment area (2) at the beginning and for moving it out of the treatment area (2) after the use of the laser therapy instrument (1), so that the treatment area (2), after the part of the beam conducting device including the exit lens system (5) has been moved out of it, is freely accessible for using the other instruments. The part of the beam conducting device that is movable out is designed as a laser arm (3), wherein the exit lens system (5) provided on the laser arm (3) is, proceeding from its working position at the eye, either swivellable out of the treatment area (2) along a circular arc path by a swivelling mechanism or movable out of the treatment area (2) along a straight line and a circular arc path. Further, the swivelling mechanism is actuatable by a motor and provided with a force limiting device.L'invention concerne un instrument laser pour thérapie sur l'œil humain, conçu pour la chirurgie de la cornée, la sclère, le corps vitré ou le cristallin, particulièrement adapté pour utilisation en succession immédiate avec d'autres instruments pour diagnostic oculaire ou thérapie oculaire, de telle manière que pendant l'utilisation alternée des différents instruments, l'œil ou au moins le patient reste de préférence dans une position et un alig
