Diamond-like carbon (DLC) films were deposited on Al substrate by electrolysis of dimethylsulfoxide (DMSO) at relatively low voltage (150 V). The morphology of the sample was investigated by SEM, indicating that the film was composed of compact grains about 100 nm. The analysis of the films by XPS, FTIR, and Raman spectroscopy revealed that the deposits are typical hydrogenated DLC films.