Aiguille du Midi, Mountain peak in Chamonix-Mont-Blanc, France

The Aiguille du Midi is a mountain peak in Chamonix-Mont-Blanc, France, reaching an elevation of 3842 meters and featuring multiple observation terraces with views of Mont Blanc and the surrounding Alpine peaks. The terraces spread across several levels and allow visitors to see the landscape from different angles.

The first ascent of the northern pinnacle was made on 4 August 1818 by the Polish count Antoni Malczewski with Jean-Michel Balmat and five guides; the central summit was reached on 5 August 1856 by three guides of Fernand de Bouillé's party. A cable car was proposed around 1909 and opened in 1955, holding the title of the world's highest for about two decades. In 1919 George Mallory and Harold Porter opened the most direct route on the north face.

The name comes from the Savoyard Arpitan form "Agouelye de Mi-jorn": seen from Chamonix town centre, the sun passes over the summit around midday. The mountain has three rock pinnacles, the North (3,795 m), Central (3,842 m) and South, and its summit buildings house France's highest radio broadcasting centre.

Visitors need warm clothing and sun protection as temperatures at the summit remain cold year-round, with frequent temperature differences of 20 degrees from the valley. The sun exposure is more intense at high altitude, so protection for eyes and skin is important.

The glass cage of "Step into the Void", opened in December 2013, juts from the summit antenna platform with a 1,035 m drop straight down. The Vallée Blanche Cable Car, running only in summer, crosses peak-to-peak to Pointe Helbronner at 3,462 m, letting visitors travel from France to Italy by air.