Infatigable was a 40-gun Valeureuse class frigate of the French Navy, built at Le Havre in 1797-1800. She took part in Allemand's expedition of 1805. In the Action of 25 September 1806, she and Gloire, Minerve and Armide were after leaving Rochefort captured by a four-ship squadron under Samuel Hood. She was taken into Royal Navy service as HMS Immortalite [1], but never used and broken up in 1811.