Abstract: A spacer comprises a handle (2) which is extended according to a certain angle by a spatula-shaped flat part (3). A removable cap (4) made of hard, transparent plastic material, containing an electric bulb (5) and electric contacts (6), is plugged in the extremity of the spatula (3). The electric supply of the bulb (4), by operation of a switch (9), is provided by means of batteries (8) housed inside the handle (2). The cap (4) and the spatula (3) are housed into a sleeve (20) made of flexible transparent plastic material, and disposable after use. The apparatus is particularly usable for lowering and holding the tongue and as optical inspection instrument for dentists.