The Frot-Laffly armoured roller, also Frot-Turmel-Laffly armoured roller (French: Char Frot-Turmel-Laffly, also Rouleau cuirassé Paul Frot), was an early French experimental armoured fighting vehicle designed and built from December 1914 to March 1915.

The immobility of the trench warfare characterizing the First World War led to a need for a powerful armed military engine that would be protected from enemy fire at the same time, and could move on the extremely irregular terrain of battlefields.

As early as 24 August 1914, the French colonel Jean Baptiste Estienne articulated the vision of a cross-country armoured vehicle:

Victory in this war will belong to the belligerent who is the first to put a cannon on a vehicle capable of moving on all kinds of terrain.

— Colonel Jean Baptiste Estienne, 24 August 1914.

One of the first attempts was made in France on 1 December 1914, when Paul Frot, an engineer in canal construction at the Compagnie Nationale du Nord, proposed to the French War Ministry a design for a vehicle with armour and armament, based on the motorization of a Laffly road roller with heavy fluted wheels that had been developed from 1912 and had been used to compact canals:

This rolling fortress, which only cannon could stop, would force our enemies to adopt another tactic, and anyway would give us a marked momentary advantage.

— Letter of Paul Frot to the French War Ministry, Les Sables d'Olonne, 1 December 1914.