Joseph Delteil

Joseph Delteil (21 March 1909 – 7 November 1979) was a French speleologist.

Delteil trained as a carpenter before turning to speleology. In 1935, he participated in the exploration of the Labouiche underground river, revealing 3800 metres of active network. In 1943 and in 1946-47, he also participated alongside Marcel Loubens [fr] and Norbert Casteret in the exploration of the abyss of Henne Morte [fr].

His name is given to the 130 metre deep shaft located at the bottom of the "gouffre Raymonde", the major chasm of the réseau Félix Trombe.