Espadon was a Narval-class submarine of the French Navy.

In 1961, as she served as a target for mock torpedo exercises, Espadon was hit by two inert torpedoes, damaging her propeller.

In September of the same year, while cruising underwater, Espadon collided with the submarine Laubie, sustaining extensive damage to her bow and to the front of her sail.

Espadon undertook significant modifications from 1966 to 1968, notably upgrading the boat's sonar, sail and rudders.

Espadon has been a museum ship at the "ville-port" of Saint-Nazaire in the German-built submarine base since 1987.