Grijpstra & De Gier is a 1979 Dutch crime film directed by Wim Verstappen.

Grijpstra is a man who easily gets frustrated and acts out his anger by hitting people.

The case is originally about a man who seems to have hanged himself but which turns out to be a murder involving the drug trade.

A sequel was made: De Ratelrat, in which Rutger Hauer was replaced by Peter Faber.

The novels were also made into a spin-off television series which ran from 2004 to 2007, with Jack Wouterse as Grijpstra and Roef Ragas as de Gier.