In the collection of Prehispanic headdresses associated to funerary contexts of the Instituto de Investigaciones Arqueológicas y Museo R.P. Gustavo Le Paige (I.I.A.M.), San Pedro de Atacama, an unusual Atacamenian specimen constituted by a velvet band and a square crown was found. The present article describes the documentation, diagnostic and conservation treatment applied to this headdress, recovered from the funerary bundle of an individual from tomb 112 of the Solcor-3 site, associated with the Tiwanaku state influence in San Pedro de Atacama.