A study of the cathodic reduction of citral at mercury in water/alcohol medium and neutral and basic pH conditions has been carried out using several electrochemical techniques. Controlled-potential coulometric and electrolysis experiments as a function of pH and applied potential showed a monomer/dimer competition. A DISP2 mechanism is proposed. We also make some remarks concerning the literature data about the citral reduction. Our work showed that besides the dimer formation the monomer yield can be improved when proper experimental parameters are chosen.