Josef Prosek studied at the State Graphic School in Prague (1945-1949).
A freelance photographer, Josef Prosek was a picture editor for the journal Kvèty in 1950-1955. In 1967 the photographer was honored by the publishing house Mladâ Fronta for the book Pariz v Parizi.
From 1948 to 1955 Josef Prosek belonged to the Association of Fine Artists "Mânes", and in 1960-1970 was a member of the art group “Radar". He has belonged to the Union of the Czechoslovak Fine Artists since 1949.