The importance of German science for Durkheim seems indubitable. But writing about his relationship with Germany is not easy because this very relationship became the main reason for attacks against Durkheim. Indeed, in 1905, Simon Deploige, a Belgian professor at Louvain University, accused him of having imported German science into France without acknowledging that it was “German.” In the tense political international context of the time, the accusation had potentially important consequences because Durkheim, as a Jew, and shortly after the Dreyfus Affair, was eventually accused to be a German spy. How should historians deal with the topic? Saying that Durkheim was “influenced” by German thought may be adopting the point of view of an actor of the time (namely, Deploige). That is why this chapter will not talk about “influence,” a term which suggests that knowledge is received passively. Instead, the chapter focuses on what Durkheim describes as “German” in order to understand how this perception evolved between the 1880s and World War I.