The Logical Structure of Linguistic Theory or LSLT is a major work in linguistics by American linguist Noam Chomsky. It was written in 1955 and published in 1975. In 1955, Chomsky submitted a part of this book as his PhD thesis titled Transformational Analysis, setting out his ideas on transformational grammar; he was awarded a Ph.D. for it, and it was privately distributed among specialists on microfilm. Chomsky offered the manuscript of LSLT for publication, but MIT's Technology Press refused to publish it. It was published by Springer in 1975.

The Logical Structure of Linguistic Theory

First edition
Author	Noam Chomsky
Language	English
Subject	Natural language syntax
Publisher	Springer US
Publication date	1975 (written 1955)
Media type	Print
Pages	592
ISBN	9780306307607
Preceded by	Morphophonemics of Modern Hebrew
Followed by	Syntactic Structures