Esaias Reusner (the Younger) (April 29, 1636 – May 1, 1679) was a German lutenist and composer.
Reusner was born in Löwenberg in Silesia, which at that time belonged to Bohemia. His first lute teacher was his father Esaias (lutenist to the Prince of Bernstadt, Heinrich Wenzel). He was a child prodigy and traveled around with his father, performing at various courts. He wrote two collections of lute suites – Deliciae testudinis and Neue Lauten-früchte. From 1655 to 1672, he was in the service of the Duke of Silesia. He then worked for a short time as a flute and lute teacher at the University of Leipzig. Finally, in 1674, he was appointed chamber lutenist at the court of Frederick William, Elector of Brandenburg, in Berlin, where he remained until his death at the age of 43.