Abstract: Ten PVCmatrix membrane perrhenate ion-selective electrodes based on basic dye-ReO₄^- are prepared. Their performances measured are very different. The electrodes prepared with ethyl violet, butylrhodamine B, brilliant green, crystal violet, night blue or methyl violt can be practically applied, the electrodes prepared with malachite green or rhoda-mine 6Gare not as good as 6 electrodes described above, and other two electrodes prepared with iodine green or rhodamine Bare hardly responsible for ReO₄^-.It is proved experimentally that the performances of ReO₄^- electrode are influenced remarkably by the construction of basic dye and this effect is mainly discussed in this paper.