Jacques-Joseph Grancher (French pronunciation: ​[ʒak ʒɔzɛf ɡʁɑ̃ʃe]; 29 September 1843 in Felletin, Creuse – 13 July 1907) was a French pediatrician born in Felletin. In 1862 he began his medical studies in Paris, where he worked as an assistant at the Hôpital des Enfants Malades (under Eugène Bouchut), the Hôpital de la Charité, the Hôpital de la Pitié and Lariboisière Hospital (under Paul Jules Tillaux). He learned histological techniques with Louis-Antoine Ranvier and Victor André Cornil in their private laboratory on Rue Christine, and for several years served as director of a pathological anatomy laboratory in Clamart (1868–1878). From 1885 until his death in 1907, he was director of Hôpital des Enfants Malades. In 1900 he was elected vice-chairman of the board of directors at the Past