Istanbul Union of the Chambers of Artists and Artisans, established in 1951, is one of the labor organizations qua the oldest public institution. It is a union, consisting in 152 İstanbul-wide chambers, members of which are the artists and artisans who combine their capital with their labor.

Abbreviated as ISTESOB, this union represents a group of 2 million persons in Istanbul including food, textile, metal, woodcraft, trucking and transportation competents and their families.

ISTESOB is a corporation which contributes to commercial and technical development of its members, and struggles for
their social rights.