This paper summarizes existing studies on cross-national differences and trends in job quality to obtain a more comprehensive picture of the current state of research. In particular, we compare different conceptualizations and analytical approaches. The review reveals the lack of a general concept of job quality which influences the comparability of previous findings. There are also very different approaches to analyze cross-national differences and trends in job quality, each with its own advantages and disadvantages. Our review concludes by identi-fying opportunities for future research.