While references are often made to Weber's economic sociology, it is not co
mmonly known that Weber himself only applied the term economic sociology (W
irtschaftssoziologic) to one of his writings, namely to Chapter 2 in Part 1
of Economy and Society, "Sociological Categories of Economic Action". This
text, as I show, has basically been ignored in the huge secondary literatu
re that exists on Weber's work as well as by economic sociologists. It repr
esents, however, a very important contribution to Weber's work in economic
sociology; indeed, it can be said to constitute Weber's manifesto in econom
ic sociology "Sociological Categories of Economic Action" is presented and
discussed, and an effort is made to make this difficult text accessible as
well as to show that it contains some extremely interesting material in eco
nomic sociology.