Pierre Bonnet (1 September 1897 Villefranche-de-Rouergue – 16 August 1990) was a French arachnologist who wrote Bibliographia Araneorum, an immense work (6,481 pages) listing publications on spiders.

His thesis, written in 1930, was devoted to the development, the phenomenon of ecdysis, autotomy and regeneration in the spiders, mainly in the European species of the genus Dolomedes.

He thus studied the life cycle of Philaeus chrysops (Salticidae), Latrodectus geometricus and Theridion tepidariorum (two Theridiidae), of Physocyclus simoni (Pholcidae), Filistata insidiatrix (Filistatidae), etc.

He indexed all the scientific names, lists the errors and misinterpretation made by their original authors and establishes strict synonymies.

Bonnet sent in 1947 a petition to the International Commission on Zoological Nomenclature asking it to accept, by derogation, the scientific names created by Carl Alexander Clerck (v. 1710–1765) in 1757.