Jacobus Hendrikus Bastiaan "Jaap" Spaanderman jr. (17 October 1896 in Gouda – 22 July 1985 in Laren) was a Dutch pianist, cellist, conductor and piano and conducting pedagogue. Jaap Spaanderman jr. was the son of organist and conductor Jacobus Hendrikus Bastiaan Spaanderman sr. (1864–1943). He studied cello with and piano with Sarah Bosmans-Benedicts. He received the Dutch Prize of Excellence twice, once as a cellist (in 1918) and once as a pianist (1920), both at the Conservatoire of Amsterdam. He further studied conducting with Hagel in Berlin.