[en] We report on the thermopower of (Ce_xPr_1-x)Cu₆ for 0≤x≤1 from 2 K up to room temperature. Over the studied temperature range, it is found that the thermopower is positive and show a maximum except for pure PrCu₆. Besides the maximum, we notice a shoulder at low temperature. With increasing Pr concentrations, the shoulder becomes more apparent and almost comparable in size to the main maximum. Using the Nordheim-Gorter rule, we have been able to estimate the magnetic contribution of Ce to the thermopower, which is found to be 50 μ V K^-1 at the maximum. We also report the thermopower of PrCu₆ for the first time. It is positive over the studied temperature range. PrCu₆ also shows a modest maximum at higher temperature. This maximum, however, is much broader and smaller than that for the Ce-rich side of CeCu₆. (author)