The Hourglass Sanatorium is a 1973 Polish surrealist film directed by Wojciech Jerzy Has, starring Jan Nowicki, Tadeusz Kondrat, Mieczysław Voit, Halina Kowalska and Gustaw Holoubek. It is also known as The Sandglass in English-speaking countries. The story follows a young Jewish man who visits his father in a mystical sanatorium where time does not behave normally. The film is an adaptation of Bruno Schulz's story collection Sanatorium Under the Sign of the Hourglass. It won the Jury Prize at the 1973 Cannes Film Festival.

Wojciech Jerzy Has was a Polish film director, screenwriter and film producer.