The invention relates to a light mixing device for a medical or dental-medical lighting device, in particular for a light curing device for the polymerization of dental masses, which device comprises a housing with a light generation device, as well as a light conductor. The light mixing device (2) comprises a bar-shaped light mixing member (8) with preferably at least one transparent material, in particular glass, as well as a holder (7) by means of which the light mixing device (2) is mountable between the light generation device (1) and the light conductor (3) and is held in position by the light conductor (3) as to be separable therefrom.
