Božidar Rašica (28 December 1912 – 13 September 1992) was an architect, scenographer and painter.
He was one of the founding members of the Exat 51 group whose active members between 1950 and 1956 were architects Bernardo Bernardi, Zdravko Bregovac, Vjenceslav Richter and Vladimir Zaharović, and painters Vlado Kristl, Ivan Picelj and Aleksandar Srnec.
He received an international architectural award in 1965 for the German Democratic Republic pavilion project.
He participated in numerous group and solo exhibitions and projects in Croatia and abroad, and received several national and international honours and awards: for example, he was the recipient of the Vladimir Nazor Award for architecture and urbanism in 1978.
The Božidar Rašica Collection was founded in 2004 as part of the Museum of Modern and Contemporary Art in Rijeka thanks to the donation by the artist's wife, Vera Marsić.