The article reports that Paul Claudel's diary occupies two dense volumes of the Pléiade, enriched by many very useful notes, especially since a diary often proceeds by allusion – hence the problem of the addressee to which will have to return. Topics include examines the Claudel's diary, which he began at Fou-Tcheou in September 1904 and which he kept until his death may appear to the reader as a laboratory where most possible forms are experimented with.