Johann Heinrich Schmelzer (c. 1620–1623 – between 29 February and 20 March 1680) was an Austrian composer and violinist of the middle Baroque era.
He described his father as a soldier, but in another document, the 1645 marriage certificate of Schmelzer's sister Eva Rosina, he is listed as a baker.
Schmelzer's colleagues at the chapel included such distinguished composers as Johann Jakob Froberger, Giovanni Valentini, and Antonio Bertali.
Unfortunately, he fell victim of the plague early in 1680, and died in Prague, where the Viennese court moved in an attempt to evade the epidemic.
It contains the brilliant virtuosity, sectional structure, and lengthy ground-bass variations typical of the mid-Baroque violin sonata.