František Martin Pechácek, also Francis Martin Pechatschek, Pechaczek, Behatschek (10 November 1763 in Ústí nad Orlicí - 26 September 1816 in Vienna) was a Bohemian violinist, pedagog, arranger and diligent composer.
His son Franz Pechácek became known as a virtuoso violinist and composer.
The collections of the Municipal Museum in Usti nad Orlici contain two of his compositions, a piece for violin and orchestra entitled Rondeau brilliant and a concert duo for two violins, Polonaise.