Laboratory-bred common marmosets (Callithrix jacchus) have a natural lifespan in captivity in excess of 12 years, while their maximum longevity is more than 16 years. Due to its small size, its relatively easy adaptation to laboratory conditions, and neuroanatomical similarities with human species, this animal is considered to represent a convenient primate model for neurosciences and drug development. The Marmoset Brain in Stereotaxic Coordinates provides a comprehensive guide for those -- both researchers and undergraduates -- who are interested in the marmoset brain, tissue target characterization and comparative anatomy. The nomenclature and atlas presentation were inspired from existing reference brain atlases in other species, and the high quality of illustrations was achieved thanks to automated whole slide scanning.