We have obtained CCD BV photometry of 665 stars in the region of the southern open cluster Haffner 6. The photometry of a nearby field is also reported. This poorly studied object is shown to be of intermediate age and to have a solar metallicity. Adopting a metal content Z=0.020, we found a colour excess E(B-V)=0.43, an apparent distance modulus (m-M)=13.90 and an age of about 1.0 Gyr. Consequently, we obtain a distance of about 3.4 kpc from the Sun. The main-sequence (MS) integrated luminosity function (ILF) is compatible with the standard Salpeter (chi=1.35) initial mass function (IMF).