Jo Baier (born 13 February 1949) is a German film director and writer.

He directed more than twenty films since 1982 and is known for Operation Valkyrie (2004), Henri 4 (2010) and Not All Were Murderers [de] (2006).

He studied drama, German and English at the Ludwig Maximilians University.

[1] As he grew up in a Bavarian village, his movies are often influenced by his childhood experiences.

For Wildfire [de], his debut as a theatrical director, he was nominated for the German Film Award.