José Erasmo Janer Gironella (1833-1911) was a Spanish entrepreneur and politician. As a businessman he is considered a member of the textile-industry-related Catalan bourgeoisie, which enjoyed peak of its power in the mid-19th century; Janer represented this group during its declining phase. Politically he earned his name as a Carlist and headed the Catalan branch of the party between 1902 and 1910.