The Cailletier, also known in English by the Italian name Taggiasca,[1] is a cultivar of olives grown primarily in the Alpes-Maritimes region near Nice and the Riviera di Ponente, Italy.

The Cailletier is particularly common in the Alpes-Maritimes region of southern France, where it is the main variety,[2] and also in nearby Liguria in Italy.

[3] Locally it is known under a number of different synonyms, including Cayet or Cayon, Grassenc, Olivier de Grasse, Pendoulier and Pleureur.

It is a cultivar of good strength and large size, with an erect growth form, and elliptic-lanceolate leaves of medium length and width.

[6] It is considered a productive cultivar, but with a tendency towards biennial bearing, i.e. that a good yield is followed by a weaker one the next year.

[3][8] It is vulnerable to certain organic pests, primarily the Bactrocera oleae (Olive fruit fly).