Arnold Andreas Bull Ahrensen Busck (29 November 1871 – 22 February 1953) was a Danish bookseller and publisher, founder of Arnold Busck A/S, Denmark's largest chain of bookstores.

His father was principal at Duebrødre Kloster and Hospital and was later appointed as Chancellor (kancelliråd).

His maternal grandfather, professor Arnold Ahrensen, a medical doctor, was co-founder of Ugeskrift for Læger.

His paternal grandfather was an estate owner whose brother was the priest Gunni Busck, a friend of N. F. S.

[1] After finishing his preliminary exams in 1888, Busck was an apprentice at Schønemann in Nyborg and worked for Det Reitzelske Forlag, a publishing house.