This paper details the substantive themes in the Sociology of Money and makes a critical assessment of how sociologists have studied the phenomenon. It shows how classical theorists saw money as a symbol and an agent of rationalization in modern societies. In particular, it examines the assumed relationship between monetization and quantification, exactness, alienation, discipline, and calculation in modern societies. The paper also discusses how money has been conceptualized more recently not only as a vehicle of rationalization but also as a cultural and cognitive object that is shaped by social categories, values, meanings, and everyday practices. The final section discusses how a relational approach could be incorporated into the sociological analysis of money.