Muntaner was born in Barcelona on 14 August 1938. He graduated in Philosophy and Literature and was for some time a Spanish and World Literature teacher, as well as a Spanish and a French teacher.

His connection with the image starts as a member of the Federació Catalana de Cineclubs (Catalan film-club federation), becoming director and presenter of cine-forums. Later he founds the film-club Seqüencia and starts creating companies dedicated to audiovisual media (Futura Video Films, TRIAC S.A., Moral i Muntaner S.A. audiovisual services, Institut de la Comunicació i Mitjans Audiovisuals (ICM), Germinal Films). He will later direct the production company Miratge i l’El•lipsi Produccions.

During his professional trajectory he has worked doing still photography in nine feature films and as director’s assistant in various films. He has written scripts for more than 20 films, and worked as cameraman and editor. He has also been a supporting actor in feature films, theatre plays and television series.

He has a long and internationally well-known filmography as director, ranging from documentaries to television ads, from educational pieces to creative works of the most personal character. He has participated in numerous festivals around the world and has been awarded many prizes.