We compute the luminosity function (LF) of galaxies in groups. The data consist of groups of galaxies selected in distance and redshift space in two samples comprising a total number of 66 groups. The assignment of galaxies to the groups was derived from the Edinburgh-Durham Southern Galaxy Catalog, considering a limiting apparent magnitude mlim = 19.4. We find a flat faint end of the mean galaxy LF in groups, which is in contrast to the mean galaxy LF in clusters where a large relative number of faint galaxies is present. We find that a Schechter function with parameters M* -19.6 ± 0.2, α -1.0 ± 0.2 provides a satisfactory fit to the galaxy LF of our total sample of groups in the range of absolute magnitudes -22 M -16.
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