PVC membranes bases on a new hydrogen-selective neutral carrier hexabutyl-tri-amidophosphate (HBTAP) are presented. These membranes also inlcude tetrakis(p-chlorophenyl)borate(TCPB) as the cation-exchanger, dioc-tylphthalate as plasticizer, and PVC. The electrodes provide a pH response in the working pH range 0-6. They can be used in HF solutions up to 0.1 mol/l. The selectivity coefficients of the electrodes, log K_HM for ion M are: Li⁺, -5.3; Na⁺, -5.3;K⁺, -6.2;NH₄⁺, -4.7;Cu²⁺, -5.0. The hydrogen ions in the membrane form the complexes H(HBTAP)₂⁺. The polarization phenomena at the membrane/solution interface were of the diffusional type. The diffusion coefficients of the H(HBTAP)₂⁺ complexes in the membrane ar estimated as D{all equal to}3×10^-7 cm² s^-1 and the dissociation degree of the salt H(HBTAP)₂TCIPB as 0.1-0.5%.