Optical observations of PSR J2039-5617 taken by the high-speed triple-beam CCD camera ULTRACAM on ESO's New Technology Telescope. Observations were taken on 2017 June 18, 2018 June 02 and 2019 July 07. Files with names like <instrument>_fluxes_<band>.dat contain the reduced light curves in ASCII format. Columns are: 1) MJD time (barycentered TDB), 2) orbital phase (in rotations, with phase = 0 corresponding to pulsar's ascending node), 3) flux density (in erg cm-2 s-1 Hz-1) 4) flux density uncertainty (in erg cm-2 s-1 Hz-1) "ultracam_rawdata.tar.gz" contains all of the raw ULTRACAM data (bias frames, flat frames, calibration observations of standard stars and science frames) from which the reduced light curves were produced. These files are in the ULTRACAM data pipeline format. "J2039-5617.par" is an ephemeris file that is compatible with a recent version of tempo2 in which the "ORBIFUNC" parameters describing an interpolating function for the orbital phase variations have been implemented.