In enzymology, a carnitinamidase () is an enzyme that catalyzes the chemical reaction
Thus, the two substrates of this enzyme are L-carnitinamide and H<sub>2</sub>O, whereas its two products are L-carnitine and NH<sub>3</sub>.
This enzyme belongs to the family of hydrolases, those acting on carbon-nitrogen bonds other than peptide bonds, specifically in linear amides. The systematic name of this enzyme class is L-carnitinamide amidohydrolase. Other names in common use include L-carnitinamidase, carnitine amidase, and L-carnitine amidase.